summaryrefslogtreecommitdiffstats
path: root/src/usr/pnor/norflash.H
blob: 29ac2f8f049141abc78a8987c86c96164f047bd0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
/* IBM_PROLOG_BEGIN_TAG                                                   */
/* This is an automatically generated prolog.                             */
/*                                                                        */
/* $Source: src/usr/pnor/norflash.H $                                     */
/*                                                                        */
/* OpenPOWER HostBoot Project                                             */
/*                                                                        */
/* Contributors Listed Below - COPYRIGHT 2014,2016                        */
/* [+] Google Inc.                                                        */
/* [+] International Business Machines Corp.                              */
/*                                                                        */
/*                                                                        */
/* Licensed under the Apache License, Version 2.0 (the "License");        */
/* you may not use this file except in compliance with the License.       */
/* You may obtain a copy of the License at                                */
/*                                                                        */
/*     http://www.apache.org/licenses/LICENSE-2.0                         */
/*                                                                        */
/* Unless required by applicable law or agreed to in writing, software    */
/* distributed under the License is distributed on an "AS IS" BASIS,      */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
/* implied. See the License for the specific language governing           */
/* permissions and limitations under the License.                         */
/*                                                                        */
/* IBM_PROLOG_END_TAG                                                     */
#ifndef __PNOR_NORFLASH_H
#define __PNOR_NORFLASH_H
#include <config.h>
#include <errl/errlentry.H>

class SfcDD;

/** @file norflash.H
 *  @brief Contains constants related to specific types of
 *    of NOR flash chips
 */

namespace PNOR {

/**
 * @brief Supported NOR Chip IDs
 */
enum NorChipIDs
{
    UNKNOWN_NOR_ID    = 0x12345600, /**< Initial value before read */

    MICRON_MFG_ID     = 0x20000000, /**< Micron Mfg ID */
    MICRON_NOR_ID     = 0x20ba2000, /**< Micron NOR */

    MACRONIX_MFG_ID   = 0xC2000000, /**< Macronix Mfg ID */
    MACRONIX64_NOR_ID = 0xC2201A00, /**< Macronix NOR MXxxL51235F */
    MACRONIX32_NOR_ID = 0xC2201900, /**< Macronix NOR MXxxL25635F */

    /* Note: Simics currently models Micron NOR  */
    VPO_NOR_ID        = 0x20201800, /**< VPO NOR chip ID */
    FAKE_NOR_ID       = 0xBADBAD00, /**< ID used during fake pnor */

    ID_MASK           = 0xFFFFFF00, /**< Only look at 3 bytes */
    MFGID_MASK        = 0xFF000000, /**< Manufacturer ID is the first byte */
};

/**
 * @brief SPI Config Info
 *    OP Codes and other MISC info for configuring SFC
 */
enum SpiConfigInfo
{
    SPI_NO_OPCODE       = 0x00, /**< Undefined value */

    /*
     * Micron Flash Commands
     */
    SPI_MICRON_FLAG_STAT    = 0x70, /**< Check write/erase complete */
    SPI_MICRON_CLRFLAG_STAT = 0x50, /**< Clear write/erase Status reg */

    /*
     * Macronix Flash Commands
     */
    SPI_MACRONIX_EN4B        = 0xB7, /**< Enable Macronix 4-Byte addressing */

    /* SPI protocol commands */
    SPI_JEDEC_WRITE_STATUS   = 0x01, //WRSR
    SPI_JEDEC_PAGE_PROGRAM   = 0x02, //PP
    SPI_JEDEC_READ           = 0x03, //READ
    SPI_JEDEC_WRITE_DISABLE  = 0x04, //WRDI
    SPI_JEDEC_READ_STATUS    = 0x05, //RDSR
    SPI_JEDEC_WRITE_ENABLE   = 0x06, //WREN
    SPI_JEDEC_FAST_READ      = 0x0B, //FAST_READ
    SPI_JEDEC_SECTOR_ERASE   = 0x20, //SE
    SPI_JEDEC_READ_SFDP      = 0x5A, //RDSFDP
    SPI_JEDEC_CHIPID         = 0x9F, //RDID
    SPI_JEDEC_BLOCK_ERASE    = 0xD8, //BE

};

/**
 * @brief General Constants related to flash
 */
enum NorConstants
{
    PAGE_PROGRAM_BYTES = 256, //**< 256 bytes per PP command
};


/**
 * Common format of Status Register
 */
union NorStatusReg_t
{
    uint8_t data8;
    struct
    {
        uint8_t writeProtect    : 1; //0
        uint8_t rsvd            : 5; //1:5
        uint8_t writeEnable     : 1; //6
        uint8_t writeInProgress : 1; //7
    };
    NorStatusReg_t() : data8(0x00) { };
};

/**
 * Flags used to trigger Hardware workarounds
 */
enum VendorWorkarounds
{
    // No workarounds present
    HWWK_NO_WORKAROUNDS = 0x00000000,

    // Must perform 'read flag status' commands after
    //  any write or erase
    HWWK_MICRON_WRT_ERASE = 0x00000001,

    // Must do a read of a low flash address before issuing read
    //  commands that return more than 1 word of data
    HWWK_MICRON_EXT_READ = 0x00000002,
};


/*
 * Vendor-specific interfaces
 */
#ifdef CONFIG_ALLOW_MICRON_PNOR

/**
 * @brief Check the version of the part to see if it has any
 *        known errors that require a workaround.
 *
 * @parm i_sfc  SFC driver to operate on
 * @parm o_workarounds  Function will OR in any flags it discovers
 *
 * @return error from operation
 */
errlHndl_t micronCheckForWorkarounds( SfcDD* i_sfc,
                                      uint32_t& o_workarounds );

/**
 * @brief Check flag status bit on Micron NOR chips
 *        The current version of Micron parts require the Flag
 *        Status register be read after a read or erase operation,
 *        otherwise all future operations won't work..
 *
 * @parm i_sfc  SFC driver to operate on
 *
 * @return Error from operation
 */
errlHndl_t micronFlagStatus( SfcDD* i_sfc );

#endif


};//namespace PNOR

#endif
OpenPOWER on IntegriCloud