1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright © 2000 Red Hat UK Limited 4*4882a593Smuzhiyun * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org> 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #ifndef __MTD_FLASHCHIP_H__ 8*4882a593Smuzhiyun #define __MTD_FLASHCHIP_H__ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun /* For spinlocks. sched.h includes spinlock.h from whichever directory it 11*4882a593Smuzhiyun * happens to be in - so we don't have to care whether we're on 2.2, which 12*4882a593Smuzhiyun * has asm/spinlock.h, or 2.4, which has linux/spinlock.h 13*4882a593Smuzhiyun */ 14*4882a593Smuzhiyun #include <linux/sched.h> 15*4882a593Smuzhiyun #include <linux/mutex.h> 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun typedef enum { 18*4882a593Smuzhiyun FL_READY, 19*4882a593Smuzhiyun FL_STATUS, 20*4882a593Smuzhiyun FL_CFI_QUERY, 21*4882a593Smuzhiyun FL_JEDEC_QUERY, 22*4882a593Smuzhiyun FL_ERASING, 23*4882a593Smuzhiyun FL_ERASE_SUSPENDING, 24*4882a593Smuzhiyun FL_ERASE_SUSPENDED, 25*4882a593Smuzhiyun FL_WRITING, 26*4882a593Smuzhiyun FL_WRITING_TO_BUFFER, 27*4882a593Smuzhiyun FL_OTP_WRITE, 28*4882a593Smuzhiyun FL_WRITE_SUSPENDING, 29*4882a593Smuzhiyun FL_WRITE_SUSPENDED, 30*4882a593Smuzhiyun FL_PM_SUSPENDED, 31*4882a593Smuzhiyun FL_SYNCING, 32*4882a593Smuzhiyun FL_UNLOADING, 33*4882a593Smuzhiyun FL_LOCKING, 34*4882a593Smuzhiyun FL_UNLOCKING, 35*4882a593Smuzhiyun FL_POINT, 36*4882a593Smuzhiyun FL_XIP_WHILE_ERASING, 37*4882a593Smuzhiyun FL_XIP_WHILE_WRITING, 38*4882a593Smuzhiyun FL_SHUTDOWN, 39*4882a593Smuzhiyun /* These 2 come from nand_state_t, which has been unified here */ 40*4882a593Smuzhiyun FL_READING, 41*4882a593Smuzhiyun FL_CACHEDPRG, 42*4882a593Smuzhiyun /* These 4 come from onenand_state_t, which has been unified here */ 43*4882a593Smuzhiyun FL_RESETTING, 44*4882a593Smuzhiyun FL_OTPING, 45*4882a593Smuzhiyun FL_PREPARING_ERASE, 46*4882a593Smuzhiyun FL_VERIFYING_ERASE, 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun FL_UNKNOWN 49*4882a593Smuzhiyun } flstate_t; 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun /* NOTE: confusingly, this can be used to refer to more than one chip at a time, 54*4882a593Smuzhiyun if they're interleaved. This can even refer to individual partitions on 55*4882a593Smuzhiyun the same physical chip when present. */ 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun struct flchip { 58*4882a593Smuzhiyun unsigned long start; /* Offset within the map */ 59*4882a593Smuzhiyun // unsigned long len; 60*4882a593Smuzhiyun /* We omit len for now, because when we group them together 61*4882a593Smuzhiyun we insist that they're all of the same size, and the chip size 62*4882a593Smuzhiyun is held in the next level up. If we get more versatile later, 63*4882a593Smuzhiyun it'll make it a damn sight harder to find which chip we want from 64*4882a593Smuzhiyun a given offset, and we'll want to add the per-chip length field 65*4882a593Smuzhiyun back in. 66*4882a593Smuzhiyun */ 67*4882a593Smuzhiyun int ref_point_counter; 68*4882a593Smuzhiyun flstate_t state; 69*4882a593Smuzhiyun flstate_t oldstate; 70*4882a593Smuzhiyun 71*4882a593Smuzhiyun unsigned int write_suspended:1; 72*4882a593Smuzhiyun unsigned int erase_suspended:1; 73*4882a593Smuzhiyun unsigned long in_progress_block_addr; 74*4882a593Smuzhiyun unsigned long in_progress_block_mask; 75*4882a593Smuzhiyun 76*4882a593Smuzhiyun struct mutex mutex; 77*4882a593Smuzhiyun wait_queue_head_t wq; /* Wait on here when we're waiting for the chip 78*4882a593Smuzhiyun to be ready */ 79*4882a593Smuzhiyun int word_write_time; 80*4882a593Smuzhiyun int buffer_write_time; 81*4882a593Smuzhiyun int erase_time; 82*4882a593Smuzhiyun 83*4882a593Smuzhiyun int word_write_time_max; 84*4882a593Smuzhiyun int buffer_write_time_max; 85*4882a593Smuzhiyun int erase_time_max; 86*4882a593Smuzhiyun 87*4882a593Smuzhiyun void *priv; 88*4882a593Smuzhiyun }; 89*4882a593Smuzhiyun 90*4882a593Smuzhiyun /* This is used to handle contention on write/erase operations 91*4882a593Smuzhiyun between partitions of the same physical chip. */ 92*4882a593Smuzhiyun struct flchip_shared { 93*4882a593Smuzhiyun struct mutex lock; 94*4882a593Smuzhiyun struct flchip *writing; 95*4882a593Smuzhiyun struct flchip *erasing; 96*4882a593Smuzhiyun }; 97*4882a593Smuzhiyun 98*4882a593Smuzhiyun 99*4882a593Smuzhiyun #endif /* __MTD_FLASHCHIP_H__ */ 100