2 * (C) Copyright 2000-2006
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
10 #define PHYS_FLASH_1 CONFIG_SYS_FLASH_BASE
11 #define FLASH_BANK_SIZE 0x800000
12 #define EN29LV640 0x227e227e
14 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
16 void flash_print_info (flash_info_t * info)
20 switch (info->flash_id & FLASH_VENDMASK) {
21 case (AMD_MANUFACT & FLASH_VENDMASK):
25 printf ("Unknown Vendor ");
29 switch (info->flash_id & FLASH_TYPEMASK) {
30 case (EN29LV640 & FLASH_TYPEMASK):
31 printf ("EN29LV640 (16Mbit)\n");
34 printf ("Unknown Chip Type\n");
39 printf (" Size: %ld MB in %d Sectors\n",
40 info->size >> 20, info->sector_count);
42 printf (" Sector Start Addresses:");
43 for (i = 0; i < info->sector_count; i++) {
47 printf (" %08lX%s", info->start[i],
48 info->protect[i] ? " (RO)" : " ");
57 unsigned long flash_init (void)
62 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
65 flash_info[i].flash_id =
66 (AMD_MANUFACT & FLASH_VENDMASK) |
67 (EN29LV640 & FLASH_TYPEMASK);
68 flash_info[i].size = FLASH_BANK_SIZE;
69 flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
70 memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
72 flashbase = PHYS_FLASH_1;
74 panic ("configured to many flash banks!\n");
76 for (j = 0; j < flash_info[i].sector_count; j++) {
77 flash_info[i].start[j] = flashbase + 0x10000 * j;
79 size += flash_info[i].size;
82 flash_protect (FLAG_PROTECT_SET,
83 CONFIG_SYS_FLASH_BASE,
84 CONFIG_SYS_FLASH_BASE + 0x2ffff, &flash_info[0]);
90 #define CMD_READ_ARRAY 0x00F0
91 #define CMD_UNLOCK1 0x00AA
92 #define CMD_UNLOCK2 0x0055
93 #define CMD_ERASE_SETUP 0x0080
94 #define CMD_ERASE_CONFIRM 0x0030
95 #define CMD_PROGRAM 0x00A0
96 #define CMD_UNLOCK_BYPASS 0x0020
98 #define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555<<1)))
99 #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA<<1)))
101 #define BIT_ERASE_DONE 0x0080
102 #define BIT_RDY_MASK 0x0080
103 #define BIT_PROGRAM_ERROR 0x0020
104 #define BIT_TIMEOUT 0x80000000 /* our flag */
111 int flash_erase (flash_info_t * info, int s_first, int s_last)
114 int iflag, prot, sect;
119 /* first look for protection bits */
121 if (info->flash_id == FLASH_UNKNOWN)
122 return ERR_UNKNOWN_FLASH_TYPE;
124 if ((s_first < 0) || (s_first > s_last)) {
128 if ((info->flash_id & FLASH_VENDMASK) !=
129 (AMD_MANUFACT & FLASH_VENDMASK)) {
130 return ERR_UNKNOWN_FLASH_VENDOR;
134 for (sect = s_first; sect <= s_last; ++sect) {
135 if (info->protect[sect]) {
140 return ERR_PROTECTED;
143 * Disable interrupts which might cause a timeout
144 * here. Remember that our exception vectors are
145 * at address 0 in the flash, and we don't want a
146 * (ticker) exception to happen while the flash
147 * chip is in programming mode.
149 iflag = disable_interrupts ();
153 /* Start erase on unprotected sectors */
154 for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
155 printf ("Erasing sector %2d ... ", sect);
157 /* arm simple, non interrupt dependent timer */
158 start = get_timer(0);
160 if (info->protect[sect] == 0) { /* not protected */
162 (volatile u16 *) (info->start[sect]);
164 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
165 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
166 MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
168 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
169 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
170 *addr = CMD_ERASE_CONFIRM;
172 /* wait until flash is ready */
179 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT * CONFIG_SYS_HZ / 1000) {
180 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
186 && (result & 0xFFFF) & BIT_ERASE_DONE)
191 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
203 } else { /* it was protected */
205 printf ("protected!\n");
210 printf ("User Interrupt!\n");
213 /* allow flash to settle - wait 10 ms */
214 printf("Waiting 10 ms...");
217 /* for (i = 0; i < 10 * 1000 * 1000; ++i)
223 enable_interrupts ();
229 static int write_word (flash_info_t * info, ulong dest, ulong data)
231 volatile u16 *addr = (volatile u16 *) dest;
239 * Check if Flash is (sufficiently) erased
242 if ((result & data) != data)
243 return ERR_NOT_ERASED;
247 * Disable interrupts which might cause a timeout
248 * here. Remember that our exception vectors are
249 * at address 0 in the flash, and we don't want a
250 * (ticker) exception to happen while the flash
251 * chip is in programming mode.
253 iflag = disable_interrupts ();
255 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
256 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
257 MEM_FLASH_ADDR1 = CMD_PROGRAM;
260 /* arm simple, non interrupt dependent timer */
261 start = get_timer(0);
263 /* wait until flash is ready */
269 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT * CONFIG_SYS_HZ / 1000) {
273 if (!chip1 && ((result & 0x80) == (data & 0x80)))
278 *addr = CMD_READ_ARRAY;
280 if (chip1 == ERR || *addr != data)
284 enable_interrupts ();
290 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
296 printf ("unaligned destination not supported\n");
302 printf ("odd transfer sizes not supported\n");
310 data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *)
312 if ((rc = write_word (info, wp - 1, data)) != 0) {
321 data = *((volatile u16 *) src);
322 if ((rc = write_word (info, wp, data)) != 0) {
331 data = (*((volatile u8 *) src) << 8) |
332 *((volatile u8 *) (wp + 1));
333 if ((rc = write_word (info, wp, data)) != 0) {