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.
28 static int doc_wait(volatile uint8_t *bios, int timeout);
29 static uint8_t doc_read_chipid(volatile uint8_t *bios);
30 static uint8_t doc_read_docstatus(volatile uint8_t *bios);
31 static uint8_t doc_read_cdsncontrol(volatile uint8_t *bios);
32 static void doc_write_cdsncontrol(volatile uint8_t *bios, uint8_t data);
34 int probe_md2802(struct flashchip *flash)
36 volatile uint8_t *bios = flash->virt_addr;
38 #ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
39 uint8_t id_0x55, id_0xAA;
40 #endif /* !MSYSTEMS_DOC_NO_55AA_CHECKING */
41 int i, toggle_a, toggle_b;
43 printf_debug("%s:\n", __FUNCTION__);
44 printf_debug("%s: *******************************\n", __FUNCTION__);
45 printf_debug("%s: * THIS IS A PRE ALPHA VERSION *\n", __FUNCTION__);
46 printf_debug("%s: * IN THE DEVELOPEMENT *********\n", __FUNCTION__);
47 printf_debug("%s: * PROCESS RIGHT NOW. **********\n", __FUNCTION__);
48 printf_debug("%s: *******************************\n", __FUNCTION__);
49 printf_debug("%s: * IF YOU ARE NOT A DEVELOPER **\n", __FUNCTION__);
50 printf_debug("%s: * THEN DO NOT TRY TO READ OR **\n", __FUNCTION__);
51 printf_debug("%s: * WRITE TO THIS DEVICE ********\n", __FUNCTION__);
52 printf_debug("%s: *******************************\n", __FUNCTION__);
53 printf_debug("%s:\n", __FUNCTION__);
55 printf_debug("%s: switching off reset mode ...\n", __FUNCTION__);
56 doc_write(0x85, bios, DOCControl);
57 doc_write(0x85, bios, DOCControl);
59 if (doc_wait(bios, 5000))
61 printf("%s: switching off reset mode ... done\n", __FUNCTION__);
62 printf("%s:\n", __FUNCTION__);
64 printf("%s: switching off write protection ...\n", __FUNCTION__);
65 doc_write_cdsncontrol(bios, doc_read_cdsncontrol(bios) & (~0x08));
66 printf("%s: switching off write protection ... done\n", __FUNCTION__);
67 printf("%s:\n", __FUNCTION__);
69 chipid = doc_read_chipid(bios);
70 #ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
71 id_0x55 = doc_read(bios, IPL_0x0000);
72 id_0xAA = doc_read(bios, IPL_0x0001);
73 #endif /* !MSYSTEMS_DOC_NO_55AA_CHECKING */
74 printf("%s: IPL_0x0000: 0x%02x\n", __FUNCTION__, id_0x55);
75 printf("%s: IPL_0x0001: 0x%02x\n", __FUNCTION__, id_0xAA);
76 printf("%s: IPL_0x0002: 0x%02x\n", __FUNCTION__,
77 doc_read(bios, IPL_0x0002));
78 printf("%s: IPL_0x0003: 0x%02x\n", __FUNCTION__,
79 doc_read(bios, IPL_0x0003));
80 printf("%s:\n", __FUNCTION__);
81 printf("%s: ChipID: 0x%02x\n", __FUNCTION__, chipid);
82 printf("%s: DOCStatus: 0x%02x\n", __FUNCTION__,
83 doc_read_docstatus(bios));
84 printf("%s: FloorSelect: 0x%02x\n", __FUNCTION__,
85 doc_read(bios, FloorSelect));
86 printf("%s: CDSNControl: 0x%02x\n", __FUNCTION__,
87 doc_read_cdsncontrol(bios));
88 printf("%s: CDSNDeviceSelect: 0x%02x\n", __FUNCTION__,
89 doc_read(bios, CDSNDeviceSelect));
90 printf("%s: ECCConfiguration: 0x%02x\n", __FUNCTION__,
91 doc_read(bios, ECCConfiguration));
92 printf("%s: CDSNSlowIO: 0x%02x\n", __FUNCTION__,
93 doc_read(bios, CDSNSlowIO));
94 printf("%s: ECCSyndrome0: 0x%02x\n", __FUNCTION__,
95 doc_read(bios, ECCSyndrome0));
96 printf("%s: ECCSyndrome1: 0x%02x\n", __FUNCTION__,
97 doc_read(bios, ECCSyndrome1));
98 printf("%s: ECCSyndrome2: 0x%02x\n", __FUNCTION__,
99 doc_read(bios, ECCSyndrome2));
100 printf("%s: ECCSyndrome3: 0x%02x\n", __FUNCTION__,
101 doc_read(bios, ECCSyndrome3));
102 printf("%s: ECCSyndrome4: 0x%02x\n", __FUNCTION__,
103 doc_read(bios, ECCSyndrome4));
104 printf("%s: ECCSyndrome5: 0x%02x\n", __FUNCTION__,
105 doc_read(bios, ECCSyndrome5));
106 printf("%s: AliasResolution: 0x%02x\n", __FUNCTION__,
107 doc_read(bios, AliasResolution));
108 printf("%s: ConfigurationInput: 0x%02x\n", __FUNCTION__,
109 doc_read(bios, ConfigurationInput));
110 printf("%s: ReadPipelineInitialization: 0x%02x\n", __FUNCTION__,
111 doc_read(bios, ReadPipelineInitialization));
112 printf("%s: LastDataRead: 0x%02x\n", __FUNCTION__,
113 doc_read(bios, LastDataRead));
114 printf("%s:\n", __FUNCTION__);
116 printf("%s: checking ECCConfiguration toggle bit\n", __FUNCTION__);
117 printf("%s:", __FUNCTION__);
118 toggle_a = toggle_b = 0;
119 for (i = 0; i < 10; i++) {
120 uint8_t toggle = doc_toggle(bios);
122 printf(" 0x%02x", toggle);
128 } /* for(i=0; i<10; i++) */
129 printf("\n%s: toggle result: %d/%d\n", __FUNCTION__, toggle_a,
132 if (chipid == flash->model_id && ((toggle_a == 5 && toggle_b == 0)
133 || (toggle_a == 0 && toggle_b == 5))
134 #ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
135 && id_0x55 == 0x55 && id_0xAA == 0xaa
136 #endif /* !MSYSTEMS_DOC_NO_55AA_CHECKING */
142 } /* int probe_md2802(struct flashchip *flash) */
144 int read_md2802(struct flashchip *flash, uint8_t *buf)
148 } /* int read_md2802(struct flashchip *flash, uint8_t *buf) */
150 int erase_md2802(struct flashchip *flash)
152 volatile uint8_t *bios = flash->virt_addr;
155 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
156 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
157 *(volatile uint8_t *)(bios + 0x5555) = 0x80;
159 *(volatile uint8_t *)(bios + 0x5555) = 0xAA;
160 *(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
161 *(volatile uint8_t *)(bios + 0x5555) = 0x10;
162 } /* int erase_md2802(struct flashchip *flash) */
164 int write_md2802(struct flashchip *flash, uint8_t *buf)
167 int total_size = flash->total_size * 1024;
168 int page_size = flash->page_size;
169 volatile uint8_t *bios = flash->virt_addr;
173 if (*bios != (uint8_t) 0xff) {
174 printf("ERASE FAILED\n");
177 printf("Programming Page: ");
178 for (i = 0; i < total_size / page_size; i++) {
179 printf("%04d at address: 0x%08x", i, i * page_size);
180 //write_page_md2802(bios, buf + i * page_size, bios + i * page_size, page_size);
182 ("\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");
185 //protect_md2802(bios);
188 } /* int write_md2802(struct flashchip *flash, uint8_t *buf) */
191 wait timeout msec for doc to become ready
196 static int doc_wait(volatile uint8_t *bios, int timeout)
202 while (_doc_busy(bios) && (i != 0)) {
203 usleep(timeout * 1000 / 20);
209 if (_doc_busy(bios)) {
215 } /* static int doc_wait(volatile uint8_t *bios, int timeout) */
217 static uint8_t doc_read_docstatus(volatile uint8_t *bios)
219 doc_read(bios, CDSNSlowIO);
222 return (doc_read(bios, _DOCStatus));
223 } /* static uint8_t doc_read_docstatus(volatile uint8_t *bios) */
225 static uint8_t doc_read_chipid(volatile uint8_t *bios)
227 doc_read(bios, CDSNSlowIO);
230 return (doc_read(bios, _ChipID));
231 } /* static uint8_t doc_read_chipid(volatile uint8_t *bios) */
233 static uint8_t doc_read_cdsncontrol(volatile uint8_t *bios)
237 /* the delays might be necessary when reading the busy bit,
238 but because a read to this reg reads the busy bit
239 anyway we better do this delays... */
241 value = doc_read(bios, _CDSNControl);
245 } /* static uint8_t doc_read_chipid(volatile char *bios) */
247 static void doc_write_cdsncontrol(volatile uint8_t *bios, uint8_t data)
249 doc_write(data, bios, _CDSNControl);
251 } /* static void doc_write_chipid(volatile char *bios, uint8_t data) */