1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Copyright © 2000 Red Hat UK Limited 3*4882a593Smuzhiyun * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org> 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #ifndef __MTD_FLASHCHIP_H__ 10*4882a593Smuzhiyun #define __MTD_FLASHCHIP_H__ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #ifndef __UBOOT__ 13*4882a593Smuzhiyun /* For spinlocks. sched.h includes spinlock.h from whichever directory it 14*4882a593Smuzhiyun * happens to be in - so we don't have to care whether we're on 2.2, which 15*4882a593Smuzhiyun * has asm/spinlock.h, or 2.4, which has linux/spinlock.h 16*4882a593Smuzhiyun */ 17*4882a593Smuzhiyun #include <linux/sched.h> 18*4882a593Smuzhiyun #include <linux/mutex.h> 19*4882a593Smuzhiyun #endif 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun typedef enum { 22*4882a593Smuzhiyun FL_READY, 23*4882a593Smuzhiyun FL_STATUS, 24*4882a593Smuzhiyun FL_CFI_QUERY, 25*4882a593Smuzhiyun FL_JEDEC_QUERY, 26*4882a593Smuzhiyun FL_ERASING, 27*4882a593Smuzhiyun FL_ERASE_SUSPENDING, 28*4882a593Smuzhiyun FL_ERASE_SUSPENDED, 29*4882a593Smuzhiyun FL_WRITING, 30*4882a593Smuzhiyun FL_WRITING_TO_BUFFER, 31*4882a593Smuzhiyun FL_OTP_WRITE, 32*4882a593Smuzhiyun FL_WRITE_SUSPENDING, 33*4882a593Smuzhiyun FL_WRITE_SUSPENDED, 34*4882a593Smuzhiyun FL_PM_SUSPENDED, 35*4882a593Smuzhiyun FL_SYNCING, 36*4882a593Smuzhiyun FL_UNLOADING, 37*4882a593Smuzhiyun FL_LOCKING, 38*4882a593Smuzhiyun FL_UNLOCKING, 39*4882a593Smuzhiyun FL_POINT, 40*4882a593Smuzhiyun FL_XIP_WHILE_ERASING, 41*4882a593Smuzhiyun FL_XIP_WHILE_WRITING, 42*4882a593Smuzhiyun FL_SHUTDOWN, 43*4882a593Smuzhiyun /* These 2 come from nand_state_t, which has been unified here */ 44*4882a593Smuzhiyun FL_READING, 45*4882a593Smuzhiyun FL_CACHEDPRG, 46*4882a593Smuzhiyun /* These 4 come from onenand_state_t, which has been unified here */ 47*4882a593Smuzhiyun FL_RESETING, 48*4882a593Smuzhiyun FL_OTPING, 49*4882a593Smuzhiyun FL_PREPARING_ERASE, 50*4882a593Smuzhiyun FL_VERIFYING_ERASE, 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun FL_UNKNOWN 53*4882a593Smuzhiyun } flstate_t; 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun /* NOTE: confusingly, this can be used to refer to more than one chip at a time, 58*4882a593Smuzhiyun if they're interleaved. This can even refer to individual partitions on 59*4882a593Smuzhiyun the same physical chip when present. */ 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun struct flchip { 62*4882a593Smuzhiyun unsigned long start; /* Offset within the map */ 63*4882a593Smuzhiyun // unsigned long len; 64*4882a593Smuzhiyun /* We omit len for now, because when we group them together 65*4882a593Smuzhiyun we insist that they're all of the same size, and the chip size 66*4882a593Smuzhiyun is held in the next level up. If we get more versatile later, 67*4882a593Smuzhiyun it'll make it a damn sight harder to find which chip we want from 68*4882a593Smuzhiyun a given offset, and we'll want to add the per-chip length field 69*4882a593Smuzhiyun back in. 70*4882a593Smuzhiyun */ 71*4882a593Smuzhiyun int ref_point_counter; 72*4882a593Smuzhiyun flstate_t state; 73*4882a593Smuzhiyun flstate_t oldstate; 74*4882a593Smuzhiyun 75*4882a593Smuzhiyun unsigned int write_suspended:1; 76*4882a593Smuzhiyun unsigned int erase_suspended:1; 77*4882a593Smuzhiyun unsigned long in_progress_block_addr; 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun struct mutex mutex; 80*4882a593Smuzhiyun #ifndef __UBOOT__ 81*4882a593Smuzhiyun wait_queue_head_t wq; /* Wait on here when we're waiting for the chip 82*4882a593Smuzhiyun to be ready */ 83*4882a593Smuzhiyun #endif 84*4882a593Smuzhiyun int word_write_time; 85*4882a593Smuzhiyun int buffer_write_time; 86*4882a593Smuzhiyun int erase_time; 87*4882a593Smuzhiyun 88*4882a593Smuzhiyun int word_write_time_max; 89*4882a593Smuzhiyun int buffer_write_time_max; 90*4882a593Smuzhiyun int erase_time_max; 91*4882a593Smuzhiyun 92*4882a593Smuzhiyun void *priv; 93*4882a593Smuzhiyun }; 94*4882a593Smuzhiyun 95*4882a593Smuzhiyun /* This is used to handle contention on write/erase operations 96*4882a593Smuzhiyun between partitions of the same physical chip. */ 97*4882a593Smuzhiyun struct flchip_shared { 98*4882a593Smuzhiyun struct mutex lock; 99*4882a593Smuzhiyun struct flchip *writing; 100*4882a593Smuzhiyun struct flchip *erasing; 101*4882a593Smuzhiyun }; 102*4882a593Smuzhiyun 103*4882a593Smuzhiyun 104*4882a593Smuzhiyun #endif /* __MTD_FLASHCHIP_H__ */ 105