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Ronald G. Minnich5b582f22006-02-23 17:16:44 +00001/*
Ronald G. Minnich5eaed682006-03-14 19:58:14 +00002 * lhf00l04.c: driver for programming JEDEC standard flash parts
Ronald G. Minnich5b582f22006-02-23 17:16:44 +00003 *
4 *
5 * Copyright 2000 Silicon Integrated System Corporation
Ronald G. Minnich5b582f22006-02-23 17:16:44 +00006 *
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.
11 *
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.
16 *
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.
20 *
21 *
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000022 * Reference: http://www.intel.com/design/chipsets/datashts/290658.htm
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000023 */
24
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000025#include <errno.h>
26#include <fcntl.h>
27#include <sys/mman.h>
28#include <sys/io.h>
29#include <unistd.h>
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000030#include <stdio.h>
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000031#include <stdlib.h>
32
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000033#include "flash.h"
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000034#include "sharplhf00l04.h"
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000035#include "debug.h"
36
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000037// I need that Berkeley bit-map printer
38void print_lhf00l04_status(uint8_t status)
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000039{
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000040 printf("%s", status & 0x80 ? "Ready:" : "Busy:");
41 printf("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");
42 printf("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");
43 printf("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");
44 printf("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");
45 printf("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");
46 printf("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000047}
48
49int probe_lhf00l04(struct flashchip *flash)
50{
51 volatile uint8_t *bios = flash->virt_addr;
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000052 uint8_t id1, id2;
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000053
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000054#if 0
55 *(volatile uint8_t *) (bios + 0x5555) = 0xAA;
56 *(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
57 *(volatile uint8_t *) (bios + 0x5555) = 0x90;
58#endif
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000059
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000060 *bios = 0xff;
61 myusec_delay(10);
62 *bios = 0x90;
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000063 myusec_delay(10);
64
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000065 id1 = *(volatile uint8_t *) bios;
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000066 id2 = *(volatile uint8_t *) (bios + 0x01);
67
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000068#if 1
69 *(volatile uint8_t *) (bios + 0x5555) = 0xAA;
70 *(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
71 *(volatile uint8_t *) (bios + 0x5555) = 0xF0;
72
73#endif
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000074 myusec_delay(10);
75
76 printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000077
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000078 if (id1 == flash->manufacture_id && id2 == flash->model_id) {
79 size_t size = flash->total_size * 1024;
80 // we need to mmap the write-protect space.
81 bios = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
82 flash->fd_mem, (off_t) (0 - 0x400000 - size));
83 if (bios == MAP_FAILED) {
84 // it's this part but we can't map it ...
85 perror("Error MMAP /dev/mem");
86 exit(1);
87 }
88
89 flash->virt_addr_2 = bios;
90 printf("bios %p, *bios 0x%x, bios[1] 0x%x\n", bios, *bios, bios[1]);
91 return 1;
92 }
93
Ronald G. Minnich5b582f22006-02-23 17:16:44 +000094 return 0;
95}
96
Ronald G. Minnich5eaed682006-03-14 19:58:14 +000097uint8_t wait_lhf00l04(volatile uint8_t *bios)
98{
99
100 uint8_t status;
101 uint8_t id1, id2;
102
103 *bios = 0x70;
104 if ((*bios & 0x80) == 0) { // it's busy
105 while ((*bios & 0x80) == 0);
106 }
107
108 status = *bios;
109
110 // put another command to get out of status register mode
111
112 *bios = 0x90;
113 myusec_delay(10);
114
115 id1 = *(volatile uint8_t *) bios;
116 id2 = *(volatile uint8_t *) (bios + 0x01);
117
118 // this is needed to jam it out of "read id" mode
119 *(volatile uint8_t *) (bios + 0x5555) = 0xAA;
120 *(volatile uint8_t *) (bios + 0x2AAA) = 0x55;
121 *(volatile uint8_t *) (bios + 0x5555) = 0xF0;
122 return status;
123
124}
125int erase_lhf00l04_block(struct flashchip *flash, int offset)
126{
127 volatile uint8_t *bios = flash->virt_addr + offset;
128 volatile uint8_t *wrprotect =
129 flash->virt_addr_2 + offset + 2;
130 uint8_t status;
131
132 // clear status register
133 *bios = 0x50;
134 printf("Erase at %p\n", bios);
135 status = wait_lhf00l04(flash->virt_addr);
136 print_lhf00l04_status(status);
137 // clear write protect
138 printf("write protect is at %p\n", (wrprotect));
139 printf("write protect is 0x%x\n", *(wrprotect));
140 *(wrprotect) = 0;
141 printf("write protect is 0x%x\n", *(wrprotect));
142
143 // now start it
144 *(volatile uint8_t *) (bios) = 0x20;
145 *(volatile uint8_t *) (bios) = 0xd0;
146 myusec_delay(10);
147 // now let's see what the register is
148 status = wait_lhf00l04(flash->virt_addr);
149 print_lhf00l04_status(status);
150 printf("DONE BLOCK 0x%x\n", offset);
151 return (0);
152}
Ronald G. Minnich5b582f22006-02-23 17:16:44 +0000153int erase_lhf00l04(struct flashchip *flash)
154{
Ronald G. Minnich5eaed682006-03-14 19:58:14 +0000155 int i;
156 unsigned int total_size = flash->total_size * 1024;
Ronald G. Minnich5b582f22006-02-23 17:16:44 +0000157
Ronald G. Minnich5eaed682006-03-14 19:58:14 +0000158 printf("total_size is %d; flash->page_size is %d\n",
159 total_size, flash->page_size);
160 for (i = 0; i < total_size; i += flash->page_size)
161 erase_lhf00l04_block(flash, i);
162 printf("DONE ERASE\n");
Ronald G. Minnich5b582f22006-02-23 17:16:44 +0000163 return (0);
164}
165
Ronald G. Minnich5eaed682006-03-14 19:58:14 +0000166void write_page_lhf00l04(volatile uint8_t *bios, uint8_t *src, volatile uint8_t *dst,
167 int page_size)
168{
169 int i;
170
171 for (i = 0; i < page_size; i++) {
172 /* transfer data from source to destination */
173 *dst = 0x40;
174 *dst++ = *src++;
175 wait_lhf00l04(bios);
176 }
177
178}
179
Ronald G. Minnich5b582f22006-02-23 17:16:44 +0000180int write_lhf00l04(struct flashchip *flash, uint8_t *buf)
181{
182 int i;
183 int total_size = flash->total_size * 1024, page_size =
184 flash->page_size;
185 volatile uint8_t *bios = flash->virt_addr;
186
Ronald G. Minnich5eaed682006-03-14 19:58:14 +0000187 erase_lhf00l04(flash);
188 if (*bios != 0xff) {
189 printf("ERASE FAILED\n");
190 return -1;
191 }
Ronald G. Minnich5b582f22006-02-23 17:16:44 +0000192 printf("Programming Page: ");
193 for (i = 0; i < total_size / page_size; i++) {
Ronald G. Minnich5b582f22006-02-23 17:16:44 +0000194 printf("%04d at address: 0x%08x", i, i * page_size);
Ronald G. Minnich5eaed682006-03-14 19:58:14 +0000195 write_page_lhf00l04(bios, buf + i * page_size,
196 bios + i * page_size, page_size);
197 printf
198 ("\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");
Ronald G. Minnich5b582f22006-02-23 17:16:44 +0000199 }
200 printf("\n");
Ronald G. Minnich5b582f22006-02-23 17:16:44 +0000201 protect_lhf00l04(bios);
Ronald G. Minnich5b582f22006-02-23 17:16:44 +0000202 return (0);
203}