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1/*␊
2 * This file is part of the flashrom project.␊
3 *␊
4 * Copyright (C) 2000 Silicon Integrated System Corporation␊
5 *␊
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.␊
10 *␊
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.␊
15 *␊
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␊
19 */␊
20␊
21/*␊
22 * Datasheet:␊
23 * - Name: Intel 82802AB/82802AC Firmware Hub (FWH)␊
24 * - URL: http://www.intel.com/design/chipsets/datashts/290658.htm␊
25 * - PDF: http://download.intel.com/design/chipsets/datashts/29065804.pdf␊
26 * - Order number: 290658-004␊
27 */␊
28␊
29#include "flash.h"␊
30#include "chipdrivers.h"␊
31␊
32void print_status_82802ab(uint8_t status)␊
33{␊
34␉msg_cdbg("%s", status & 0x80 ? "Ready:" : "Busy:");␊
35␉msg_cdbg("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");␊
36␉msg_cdbg("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");␊
37␉msg_cdbg("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");␊
38␉msg_cdbg("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");␊
39␉msg_cdbg("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");␊
40␉msg_cdbg("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");␊
41}␊
42␊
43int probe_82802ab(struct flashctx *flash)␊
44{␊
45␉chipaddr bios = flash->virtual_memory;␊
46␉uint8_t id1, id2, flashcontent1, flashcontent2;␊
47␉int shifted = (flash->feature_bits & FEATURE_ADDR_SHIFTED) != 0;␊
48␊
49␉/* Reset to get a clean state */␊
50␉chip_writeb(flash, 0xFF, bios);␊
51␉programmer_delay(10);␊
52␊
53␉/* Enter ID mode */␊
54␉chip_writeb(flash, 0x90, bios);␊
55␉programmer_delay(10);␊
56␊
57␉id1 = chip_readb(flash, bios + (0x00 << shifted));␊
58␉id2 = chip_readb(flash, bios + (0x01 << shifted));␊
59␊
60␉/* Leave ID mode */␊
61␉chip_writeb(flash, 0xFF, bios);␊
62␊
63␉programmer_delay(10);␊
64␊
65␉msg_cdbg("%s: id1 0x%02x, id2 0x%02x", __func__, id1, id2);␊
66␊
67␉if (!oddparity(id1))␊
68␉␉msg_cdbg(", id1 parity violation");␊
69␊
70␉/*␊
71␉ * Read the product ID location again. We should now see normal␊
72␉ * flash contents.␊
73␉ */␊
74␉flashcontent1 = chip_readb(flash, bios + (0x00 << shifted));␊
75␉flashcontent2 = chip_readb(flash, bios + (0x01 << shifted));␊
76␊
77␉if (id1 == flashcontent1)␊
78␉␉msg_cdbg(", id1 is normal flash content");␊
79␉if (id2 == flashcontent2)␊
80␉␉msg_cdbg(", id2 is normal flash content");␊
81␊
82␉msg_cdbg("\n");␊
83␉if (id1 != flash->manufacture_id || id2 != flash->model_id)␊
84␉␉return 0;␊
85␊
86␉if (flash->feature_bits & FEATURE_REGISTERMAP)␊
87␉␉map_flash_registers(flash);␊
88␊
89␉return 1;␊
90}␊
91␊
92uint8_t wait_82802ab(struct flashctx *flash)␊
93{␊
94␉uint8_t status;␊
95␉chipaddr bios = flash->virtual_memory;␊
96␊
97␉chip_writeb(flash, 0x70, bios);␊
98␉if ((chip_readb(flash, bios) & 0x80) == 0) {␉// it's busy␊
99␉␉while ((chip_readb(flash, bios) & 0x80) == 0) ;␊
100␉}␊
101␊
102␉status = chip_readb(flash, bios);␊
103␊
104␉/* Reset to get a clean state */␊
105␉chip_writeb(flash, 0xFF, bios);␊
106␊
107␉return status;␊
108}␊
109␊
110int unlock_82802ab(struct flashctx *flash)␊
111{␊
112␉int i;␊
113␉//chipaddr wrprotect = flash->virtual_registers + page + 2;␊
114␊
115␉for (i = 0; i < flash->total_size * 1024; i+= flash->page_size)␊
116␉␉chip_writeb(flash, 0, flash->virtual_registers + i + 2);␊
117␊
118␉return 0;␊
119}␊
120␊
121int erase_block_82802ab(struct flashctx *flash, unsigned int page,␊
122␉␉␉unsigned int pagesize)␊
123{␊
124␉chipaddr bios = flash->virtual_memory;␊
125␉uint8_t status;␊
126␊
127␉// clear status register␊
128␉chip_writeb(flash, 0x50, bios + page);␊
129␊
130␉// now start it␊
131␉chip_writeb(flash, 0x20, bios + page);␊
132␉chip_writeb(flash, 0xd0, bios + page);␊
133␉programmer_delay(10);␊
134␊
135␉// now let's see what the register is␊
136␉status = wait_82802ab(flash);␊
137␉print_status_82802ab(status);␊
138␊
139␉/* FIXME: Check the status register for errors. */␊
140␉return 0;␊
141}␊
142␊
143/* chunksize is 1 */␊
144int write_82802ab(struct flashctx *flash, uint8_t *src, unsigned int start,␊
145␉␉ unsigned int len)␊
146{␊
147␉int i;␊
148␉chipaddr dst = flash->virtual_memory + start;␊
149␊
150␉for (i = 0; i < len; i++) {␊
151␉␉/* transfer data from source to destination */␊
152␉␉chip_writeb(flash, 0x40, dst);␊
153␉␉chip_writeb(flash, *src++, dst++);␊
154␉␉wait_82802ab(flash);␊
155␉}␊
156␊
157␉/* FIXME: Ignore errors for now. */␊
158␉return 0;␊
159}␊
160␊
161int unlock_28f004s5(struct flashctx *flash)␊
162{␊
163␉chipaddr bios = flash->virtual_memory;␊
164␉uint8_t mcfg, bcfg, need_unlock = 0, can_unlock = 0;␊
165␉int i;␊
166␊
167␉/* Clear status register */␊
168␉chip_writeb(flash, 0x50, bios);␊
169␊
170␉/* Read identifier codes */␊
171␉chip_writeb(flash, 0x90, bios);␊
172␊
173␉/* Read master lock-bit */␊
174␉mcfg = chip_readb(flash, bios + 0x3);␊
175␉msg_cdbg("master lock is ");␊
176␉if (mcfg) {␊
177␉␉msg_cdbg("locked!\n");␊
178␉} else {␊
179␉␉msg_cdbg("unlocked!\n");␊
180␉␉can_unlock = 1;␊
181␉}␊
182␊
183␉/* Read block lock-bits */␊
184␉for (i = 0; i < flash->total_size * 1024; i+= (64 * 1024)) {␊
185␉␉bcfg = chip_readb(flash, bios + i + 2); // read block lock config␊
186␉␉msg_cdbg("block lock at %06x is %slocked!\n", i, bcfg ? "" : "un");␊
187␉␉if (bcfg) {␊
188␉␉␉need_unlock = 1;␊
189␉␉}␊
190␉}␊
191␊
192␉/* Reset chip */␊
193␉chip_writeb(flash, 0xFF, bios);␊
194␊
195␉/* Unlock: clear block lock-bits, if needed */␊
196␉if (can_unlock && need_unlock) {␊
197␉␉msg_cdbg("Unlock: ");␊
198␉␉chip_writeb(flash, 0x60, bios);␊
199␉␉chip_writeb(flash, 0xD0, bios);␊
200␉␉chip_writeb(flash, 0xFF, bios);␊
201␉␉msg_cdbg("Done!\n");␊
202␉}␊
203␊
204␉/* Error: master locked or a block is locked */␊
205␉if (!can_unlock && need_unlock) {␊
206␉␉msg_cerr("At least one block is locked and lockdown is active!\n");␊
207␉␉return -1;␊
208␉}␊
209␊
210␉return 0;␊
211}␊
212␊
213int unlock_lh28f008bjt(struct flashctx *flash)␊
214{␊
215␉chipaddr bios = flash->virtual_memory;␊
216␉uint8_t mcfg, bcfg;␊
217␉uint8_t need_unlock = 0, can_unlock = 0;␊
218␉int i;␊
219␊
220␉/* Wait if chip is busy */␊
221␉wait_82802ab(flash);␊
222␊
223␉/* Read identifier codes */␊
224␉chip_writeb(flash, 0x90, bios);␊
225␊
226␉/* Read master lock-bit */␊
227␉mcfg = chip_readb(flash, bios + 0x3);␊
228␉msg_cdbg("master lock is ");␊
229␉if (mcfg) {␊
230␉␉msg_cdbg("locked!\n");␊
231␉} else {␊
232␉␉msg_cdbg("unlocked!\n");␊
233␉␉can_unlock = 1;␊
234␉}␊
235␊
236␉/* Read block lock-bits, 8 * 8 KB + 15 * 64 KB */␊
237␉for (i = 0; i < flash->total_size * 1024;␊
238␉ i += (i >= (64 * 1024) ? 64 * 1024 : 8 * 1024)) {␊
239␉␉bcfg = chip_readb(flash, bios + i + 2); /* read block lock config */␊
240␉␉msg_cdbg("block lock at %06x is %slocked!\n", i,␊
241␉␉␉ bcfg ? "" : "un");␊
242␉␉if (bcfg)␊
243␉␉␉need_unlock = 1;␊
244␉}␊
245␊
246␉/* Reset chip */␊
247␉chip_writeb(flash, 0xFF, bios);␊
248␊
249␉/* Unlock: clear block lock-bits, if needed */␊
250␉if (can_unlock && need_unlock) {␊
251␉␉msg_cdbg("Unlock: ");␊
252␉␉chip_writeb(flash, 0x60, bios);␊
253␉␉chip_writeb(flash, 0xD0, bios);␊
254␉␉chip_writeb(flash, 0xFF, bios);␊
255␉␉wait_82802ab(flash);␊
256␉␉msg_cdbg("Done!\n");␊
257␉}␊
258␊
259␉/* Error: master locked or a block is locked */␊
260␉if (!can_unlock && need_unlock) {␊
261␉␉msg_cerr("At least one block is locked and lockdown is active!\n");␊
262␉␉return -1;␊
263␉}␊
264␊
265␉return 0;␊
266}␊
267

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