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Tom Rini83d290c2018-05-06 17:58:06 -04001/* SPDX-License-Identifier: GPL-2.0+ */
Heiko Schocherff94bc42014-06-24 10:10:04 +02002/*
3 * Copyright © 2000 Red Hat UK Limited
4 * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org>
5 *
Heiko Schocherff94bc42014-06-24 10:10:04 +02006 */
7
8#ifndef __MTD_FLASHCHIP_H__
9#define __MTD_FLASHCHIP_H__
10
Heiko Schocherff94bc42014-06-24 10:10:04 +020011#ifndef __UBOOT__
12/* For spinlocks. sched.h includes spinlock.h from whichever directory it
13 * happens to be in - so we don't have to care whether we're on 2.2, which
14 * has asm/spinlock.h, or 2.4, which has linux/spinlock.h
15 */
16#include <linux/sched.h>
17#include <linux/mutex.h>
18#endif
19
20typedef enum {
21 FL_READY,
22 FL_STATUS,
23 FL_CFI_QUERY,
24 FL_JEDEC_QUERY,
25 FL_ERASING,
26 FL_ERASE_SUSPENDING,
27 FL_ERASE_SUSPENDED,
28 FL_WRITING,
29 FL_WRITING_TO_BUFFER,
30 FL_OTP_WRITE,
31 FL_WRITE_SUSPENDING,
32 FL_WRITE_SUSPENDED,
33 FL_PM_SUSPENDED,
34 FL_SYNCING,
35 FL_UNLOADING,
36 FL_LOCKING,
37 FL_UNLOCKING,
38 FL_POINT,
39 FL_XIP_WHILE_ERASING,
40 FL_XIP_WHILE_WRITING,
41 FL_SHUTDOWN,
42 /* These 2 come from nand_state_t, which has been unified here */
43 FL_READING,
44 FL_CACHEDPRG,
45 /* These 4 come from onenand_state_t, which has been unified here */
46 FL_RESETING,
47 FL_OTPING,
48 FL_PREPARING_ERASE,
49 FL_VERIFYING_ERASE,
50
51 FL_UNKNOWN
52} flstate_t;
53
54
55
56/* NOTE: confusingly, this can be used to refer to more than one chip at a time,
57 if they're interleaved. This can even refer to individual partitions on
58 the same physical chip when present. */
59
60struct flchip {
61 unsigned long start; /* Offset within the map */
62 // unsigned long len;
63 /* We omit len for now, because when we group them together
64 we insist that they're all of the same size, and the chip size
65 is held in the next level up. If we get more versatile later,
66 it'll make it a damn sight harder to find which chip we want from
67 a given offset, and we'll want to add the per-chip length field
68 back in.
69 */
70 int ref_point_counter;
71 flstate_t state;
72 flstate_t oldstate;
73
74 unsigned int write_suspended:1;
75 unsigned int erase_suspended:1;
76 unsigned long in_progress_block_addr;
77
78 struct mutex mutex;
79#ifndef __UBOOT__
80 wait_queue_head_t wq; /* Wait on here when we're waiting for the chip
81 to be ready */
82#endif
83 int word_write_time;
84 int buffer_write_time;
85 int erase_time;
86
87 int word_write_time_max;
88 int buffer_write_time_max;
89 int erase_time_max;
90
91 void *priv;
92};
93
94/* This is used to handle contention on write/erase operations
95 between partitions of the same physical chip. */
96struct flchip_shared {
97 struct mutex lock;
98 struct flchip *writing;
99 struct flchip *erasing;
100};
101
102
103#endif /* __MTD_FLASHCHIP_H__ */