2 * msys_doc.c: driver for programming m-systems doc devices
5 * Copyright 2003 Niki W. Waibel <niki.waibel@gmx.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
33 static int doc_wait(volatile char *bios, int timeout);
34 static unsigned char doc_read_chipid(volatile char *bios);
35 static unsigned char doc_read_docstatus(volatile char *bios);
36 static unsigned char doc_read_cdsncontrol(volatile char *bios);
37 static void doc_write_cdsncontrol(volatile char *bios, unsigned char data);
43 int probe_md2802(struct flashchip *flash)
45 volatile char *bios = flash->virt_addr;
47 #ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
48 unsigned char id_0x55, id_0xAA;
49 #endif /* !MSYSTEMS_DOC_NO_55AA_CHECKING */
50 int i, toggle_a, toggle_b;
52 printf("%s:\n", __FUNCTION__);
53 printf("%s: *******************************\n", __FUNCTION__);
54 printf("%s: * THIS IS A PRE ALPHA VERSION *\n", __FUNCTION__);
55 printf("%s: * IN THE DEVELOPEMENT *********\n", __FUNCTION__);
56 printf("%s: * PROCESS RIGHT NOW. **********\n", __FUNCTION__);
57 printf("%s: *******************************\n", __FUNCTION__);
58 printf("%s: * IF YOU ARE NOT A DEVELOPER **\n", __FUNCTION__);
59 printf("%s: * THEN DO NOT TRY TO READ OR **\n", __FUNCTION__);
60 printf("%s: * WRITE TO THIS DEVICE ********\n", __FUNCTION__);
61 printf("%s: *******************************\n", __FUNCTION__);
62 printf("%s:\n", __FUNCTION__);
64 printf("%s: switching off reset mode ...\n", __FUNCTION__);
65 doc_write(0x85, bios, DOCControl);
66 doc_write(0x85, bios, DOCControl);
68 if (doc_wait(bios, 5000))
70 printf("%s: switching off reset mode ... done\n", __FUNCTION__);
71 printf("%s:\n", __FUNCTION__);
73 printf("%s: switching off write protection ...\n", __FUNCTION__);
74 doc_write_cdsncontrol(bios, doc_read_cdsncontrol(bios) & (~0x08));
75 printf("%s: switching off write protection ... done\n",
77 printf("%s:\n", __FUNCTION__);
80 chipid = doc_read_chipid(bios);
81 #ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
82 id_0x55 = doc_read(bios, IPL_0x0000);
83 id_0xAA = doc_read(bios, IPL_0x0001);
84 #endif /* !MSYSTEMS_DOC_NO_55AA_CHECKING */
85 printf("%s: IPL_0x0000: 0x%02x\n", __FUNCTION__, id_0x55);
86 printf("%s: IPL_0x0001: 0x%02x\n", __FUNCTION__, id_0xAA);
87 printf("%s: IPL_0x0002: 0x%02x\n", __FUNCTION__,
88 doc_read(bios, IPL_0x0002));
89 printf("%s: IPL_0x0003: 0x%02x\n", __FUNCTION__,
90 doc_read(bios, IPL_0x0003));
91 printf("%s:\n", __FUNCTION__);
92 printf("%s: ChipID: 0x%02x\n", __FUNCTION__, chipid);
93 printf("%s: DOCStatus: 0x%02x\n", __FUNCTION__,
94 doc_read_docstatus(bios));
95 printf("%s: FloorSelect: 0x%02x\n", __FUNCTION__,
96 doc_read(bios, FloorSelect));
97 printf("%s: CDSNControl: 0x%02x\n", __FUNCTION__,
98 doc_read_cdsncontrol(bios));
99 printf("%s: CDSNDeviceSelect: 0x%02x\n", __FUNCTION__,
100 doc_read(bios, CDSNDeviceSelect));
101 printf("%s: ECCConfiguration: 0x%02x\n", __FUNCTION__,
102 doc_read(bios, ECCConfiguration));
103 printf("%s: CDSNSlowIO: 0x%02x\n", __FUNCTION__,
104 doc_read(bios, CDSNSlowIO));
105 printf("%s: ECCSyndrome0: 0x%02x\n", __FUNCTION__,
106 doc_read(bios, ECCSyndrome0));
107 printf("%s: ECCSyndrome1: 0x%02x\n", __FUNCTION__,
108 doc_read(bios, ECCSyndrome1));
109 printf("%s: ECCSyndrome2: 0x%02x\n", __FUNCTION__,
110 doc_read(bios, ECCSyndrome2));
111 printf("%s: ECCSyndrome3: 0x%02x\n", __FUNCTION__,
112 doc_read(bios, ECCSyndrome3));
113 printf("%s: ECCSyndrome4: 0x%02x\n", __FUNCTION__,
114 doc_read(bios, ECCSyndrome4));
115 printf("%s: ECCSyndrome5: 0x%02x\n", __FUNCTION__,
116 doc_read(bios, ECCSyndrome5));
117 printf("%s: AliasResolution: 0x%02x\n", __FUNCTION__,
118 doc_read(bios, AliasResolution));
119 printf("%s: ConfigurationInput: 0x%02x\n", __FUNCTION__,
120 doc_read(bios, ConfigurationInput));
121 printf("%s: ReadPipelineInitialization: 0x%02x\n", __FUNCTION__,
122 doc_read(bios, ReadPipelineInitialization));
123 printf("%s: LastDataRead: 0x%02x\n", __FUNCTION__,
124 doc_read(bios, LastDataRead));
125 printf("%s:\n", __FUNCTION__);
127 printf("%s: checking ECCConfiguration toggle bit\n", __FUNCTION__);
128 printf("%s:", __FUNCTION__);
129 toggle_a = toggle_b = 0;
130 for (i = 0; i < 10; i++) {
131 unsigned char toggle = doc_toggle(bios);
133 printf(" 0x%02x", toggle);
139 } /* for(i=0; i<10; i++) */
140 printf("\n%s: toggle result: %d/%d\n", __FUNCTION__, toggle_a,
143 if (chipid == flash->model_id
144 && ((toggle_a == 5 && toggle_b == 0)
145 || (toggle_a == 0 && toggle_b == 5))
146 #ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
147 && id_0x55 == 0x55 && id_0xAA == 0xaa
148 #endif /* !MSYSTEMS_DOC_NO_55AA_CHECKING */
154 } /* int probe_md2802(struct flashchip *flash) */
158 int read_md2802(struct flashchip *flash, unsigned char *buf)
162 } /* int read_md2802(struct flashchip *flash, unsigned char *buf) */
166 int erase_md2802(struct flashchip *flash)
168 volatile char *bios = flash->virt_addr;
171 *(volatile char *) (bios + 0x5555) = 0xAA;
172 *(volatile char *) (bios + 0x2AAA) = 0x55;
173 *(volatile char *) (bios + 0x5555) = 0x80;
175 *(volatile char *) (bios + 0x5555) = 0xAA;
176 *(volatile char *) (bios + 0x2AAA) = 0x55;
177 *(volatile char *) (bios + 0x5555) = 0x10;
178 } /* int erase_md2802(struct flashchip *flash) */
182 int write_md2802(struct flashchip *flash, unsigned char *buf)
185 int total_size = flash->total_size * 1024, page_size =
187 volatile unsigned char *bios = flash->virt_addr;
191 if (*bios != (unsigned char) 0xff) {
192 printf("ERASE FAILED\n");
195 printf("Programming Page: ");
196 for (i = 0; i < total_size / page_size; i++) {
197 printf("%04d at address: 0x%08x", i, i * page_size);
198 //write_page_md2802(bios, buf + i * page_size, bios + i * page_size, page_size);
200 ("\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");
203 //protect_md2802(bios);
206 } /* int write_md2802(struct flashchip *flash, char *buf) */
214 wait timeout msec for doc to become ready
219 static int doc_wait(volatile char *bios, int timeout)
225 while (_doc_busy(bios) && (i != 0)) {
226 usleep(timeout * 1000 / 20);
232 if (_doc_busy(bios)) {
238 } /* static int doc_wait(volatile char *bios, int timeout) */
242 static unsigned char doc_read_docstatus(volatile char *bios)
244 doc_read(bios, CDSNSlowIO);
247 return (doc_read(bios, _DOCStatus));
248 } /* static unsigned char doc_read_docstatus(volatile char *bios) */
252 static unsigned char doc_read_chipid(volatile char *bios)
254 doc_read(bios, CDSNSlowIO);
257 return (doc_read(bios, _ChipID));
258 } /* static unsigned char doc_read_chipid(volatile char *bios) */
262 static unsigned char doc_read_cdsncontrol(volatile char *bios)
266 /* the delays might be necessary when reading the busy bit,
267 but because a read to this reg reads the busy bit
268 anyway we better do this delays... */
270 value = doc_read(bios, _CDSNControl);
274 } /* static unsigned char doc_read_chipid(volatile char *bios) */
278 static void doc_write_cdsncontrol(volatile char *bios, unsigned char data)
280 doc_write(data, bios, _CDSNControl);
282 } /* static void doc_write_chipid(volatile char *bios, unsigned char data) */