2 * This file is part of the flashrom project.
4 * Copyright (C) 2003 Niki W. Waibel <niki.waibel@gmx.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
26 static int doc_wait(volatile uint8_t *bios, int timeout);
27 static uint8_t doc_read_chipid(volatile uint8_t *bios);
28 static uint8_t doc_read_docstatus(volatile uint8_t *bios);
29 static uint8_t doc_read_cdsncontrol(volatile uint8_t *bios);
30 static void doc_write_cdsncontrol(volatile uint8_t *bios, uint8_t data);
32 int probe_md2802(struct flashchip *flash)
34 volatile uint8_t *bios = flash->virtual_memory;
36 #ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
37 uint8_t id_0x55, id_0xAA;
38 #endif /* !MSYSTEMS_DOC_NO_55AA_CHECKING */
39 int i, toggle_a, toggle_b;
41 printf_debug("%s:\n", __FUNCTION__);
42 printf_debug("%s: *******************************\n", __FUNCTION__);
43 printf_debug("%s: * THIS IS A PRE ALPHA VERSION *\n", __FUNCTION__);
44 printf_debug("%s: * IN THE DEVELOPEMENT *********\n", __FUNCTION__);
45 printf_debug("%s: * PROCESS RIGHT NOW. **********\n", __FUNCTION__);
46 printf_debug("%s: *******************************\n", __FUNCTION__);
47 printf_debug("%s: * IF YOU ARE NOT A DEVELOPER **\n", __FUNCTION__);
48 printf_debug("%s: * THEN DO NOT TRY TO READ OR **\n", __FUNCTION__);
49 printf_debug("%s: * WRITE TO THIS DEVICE ********\n", __FUNCTION__);
50 printf_debug("%s: *******************************\n", __FUNCTION__);
51 printf_debug("%s:\n", __FUNCTION__);
53 printf_debug("%s: switching off reset mode ...\n", __FUNCTION__);
54 doc_write(0x85, bios, DOCControl);
55 doc_write(0x85, bios, DOCControl);
57 if (doc_wait(bios, 5000))
59 printf("%s: switching off reset mode ... done\n", __FUNCTION__);
60 printf("%s:\n", __FUNCTION__);
62 printf("%s: switching off write protection ...\n", __FUNCTION__);
63 doc_write_cdsncontrol(bios, doc_read_cdsncontrol(bios) & (~0x08));
64 printf("%s: switching off write protection ... done\n", __FUNCTION__);
65 printf("%s:\n", __FUNCTION__);
67 chipid = doc_read_chipid(bios);
68 #ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
69 id_0x55 = doc_read(bios, IPL_0x0000);
70 id_0xAA = doc_read(bios, IPL_0x0001);
71 #endif /* !MSYSTEMS_DOC_NO_55AA_CHECKING */
72 printf("%s: IPL_0x0000: 0x%02x\n", __FUNCTION__, id_0x55);
73 printf("%s: IPL_0x0001: 0x%02x\n", __FUNCTION__, id_0xAA);
74 printf("%s: IPL_0x0002: 0x%02x\n", __FUNCTION__,
75 doc_read(bios, IPL_0x0002));
76 printf("%s: IPL_0x0003: 0x%02x\n", __FUNCTION__,
77 doc_read(bios, IPL_0x0003));
78 printf("%s:\n", __FUNCTION__);
79 printf("%s: ChipID: 0x%02x\n", __FUNCTION__, chipid);
80 printf("%s: DOCStatus: 0x%02x\n", __FUNCTION__,
81 doc_read_docstatus(bios));
82 printf("%s: FloorSelect: 0x%02x\n", __FUNCTION__,
83 doc_read(bios, FloorSelect));
84 printf("%s: CDSNControl: 0x%02x\n", __FUNCTION__,
85 doc_read_cdsncontrol(bios));
86 printf("%s: CDSNDeviceSelect: 0x%02x\n", __FUNCTION__,
87 doc_read(bios, CDSNDeviceSelect));
88 printf("%s: ECCConfiguration: 0x%02x\n", __FUNCTION__,
89 doc_read(bios, ECCConfiguration));
90 printf("%s: CDSNSlowIO: 0x%02x\n", __FUNCTION__,
91 doc_read(bios, CDSNSlowIO));
92 printf("%s: ECCSyndrome0: 0x%02x\n", __FUNCTION__,
93 doc_read(bios, ECCSyndrome0));
94 printf("%s: ECCSyndrome1: 0x%02x\n", __FUNCTION__,
95 doc_read(bios, ECCSyndrome1));
96 printf("%s: ECCSyndrome2: 0x%02x\n", __FUNCTION__,
97 doc_read(bios, ECCSyndrome2));
98 printf("%s: ECCSyndrome3: 0x%02x\n", __FUNCTION__,
99 doc_read(bios, ECCSyndrome3));
100 printf("%s: ECCSyndrome4: 0x%02x\n", __FUNCTION__,
101 doc_read(bios, ECCSyndrome4));
102 printf("%s: ECCSyndrome5: 0x%02x\n", __FUNCTION__,
103 doc_read(bios, ECCSyndrome5));
104 printf("%s: AliasResolution: 0x%02x\n", __FUNCTION__,
105 doc_read(bios, AliasResolution));
106 printf("%s: ConfigurationInput: 0x%02x\n", __FUNCTION__,
107 doc_read(bios, ConfigurationInput));
108 printf("%s: ReadPipelineInitialization: 0x%02x\n", __FUNCTION__,
109 doc_read(bios, ReadPipelineInitialization));
110 printf("%s: LastDataRead: 0x%02x\n", __FUNCTION__,
111 doc_read(bios, LastDataRead));
112 printf("%s:\n", __FUNCTION__);
114 printf("%s: checking ECCConfiguration toggle bit\n", __FUNCTION__);
115 printf("%s:", __FUNCTION__);
116 toggle_a = toggle_b = 0;
117 for (i = 0; i < 10; i++) {
118 uint8_t toggle = doc_toggle(bios);
120 printf(" 0x%02x", toggle);
126 } /* for(i=0; i<10; i++) */
127 printf("\n%s: toggle result: %d/%d\n", __FUNCTION__, toggle_a,
130 if (chipid == flash->model_id && ((toggle_a == 5 && toggle_b == 0)
131 || (toggle_a == 0 && toggle_b == 5))
132 #ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
133 && id_0x55 == 0x55 && id_0xAA == 0xaa
134 #endif /* !MSYSTEMS_DOC_NO_55AA_CHECKING */
142 int read_md2802(struct flashchip *flash, uint8_t *buf)
147 int erase_md2802(struct flashchip *flash)
149 volatile uint8_t *bios = flash->virtual_memory;
153 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
154 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
155 *(volatile uint8_t *)(bios + 0x5555) = 0x80;
157 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
158 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
159 *(volatile uint8_t *)(bios + 0x5555) = 0x10;
162 int write_md2802(struct flashchip *flash, uint8_t *buf)
165 int total_size = flash->total_size * 1024;
166 int page_size = flash->page_size;
167 volatile uint8_t *bios = flash->virtual_memory;
171 if (*bios != (uint8_t) 0xff) {
172 printf("ERASE FAILED!\n");
175 printf("Programming page: ");
176 for (i = 0; i < total_size / page_size; i++) {
177 printf("%04d at address: 0x%08x", i, i * page_size);
178 //write_page_md2802(bios, buf + i * page_size, bios + i * page_size, page_size);
180 ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
183 //protect_md2802(bios);
186 } /* int write_md2802(struct flashchip *flash, uint8_t *buf) */
189 wait timeout msec for doc to become ready
195 static int doc_wait(volatile uint8_t *bios, int timeout)
201 while (_doc_busy(bios) && (i != 0)) {
202 usleep(timeout * 1000 / 20);
208 if (_doc_busy(bios)) {
216 static uint8_t doc_read_docstatus(volatile uint8_t *bios)
218 doc_read(bios, CDSNSlowIO);
221 return (doc_read(bios, _DOCStatus));
224 static uint8_t doc_read_chipid(volatile uint8_t *bios)
226 doc_read(bios, CDSNSlowIO);
229 return (doc_read(bios, _ChipID));
232 static uint8_t doc_read_cdsncontrol(volatile uint8_t *bios)
236 /* the delays might be necessary when reading the busy bit,
237 but because a read to this reg reads the busy bit
238 anyway we better do this delays... */
240 value = doc_read(bios, _CDSNControl);
246 static void doc_write_cdsncontrol(volatile uint8_t *bios, uint8_t data)
248 doc_write(data, bios, _CDSNControl);