2 * Copyright (C) 2003 ETC s.r.o.
4 * This code was inspired by Marius Groeger and Kyle Harris code
5 * available in other board ports for U-Boot
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * Written by Peter Figuli <peposh@etc.sk>, 2003.
34 * This code should handle CFI FLASH memory device. This code is very
35 * minimalistic approach without many essential error handling code as well.
36 * Because U-Boot actually is missing smart handling of FLASH device,
37 * we just set flash_id to anything else to FLASH_UNKNOW, so common code
38 * can call us without any restrictions.
39 * TODO: Add CFI Query, to be able to determine FLASH device.
40 * TODO: Add error handling code
41 * NOTE: This code was tested with BUS_WIDTH 4 and ITERLEAVE 2 only, but
42 * hopefully may work with other configurations.
45 #if ( SCB9328_FLASH_BUS_WIDTH == 1 )
46 # define FLASH_BUS vu_char
47 # define FLASH_BUS_RET u_char
48 # if ( SCB9328_FLASH_INTERLEAVE == 1 )
49 # define FLASH_CMD( x ) x
51 # error "With 8bit bus only one chip is allowed"
55 #elif ( SCB9328_FLASH_BUS_WIDTH == 2 )
56 # define FLASH_BUS vu_short
57 # define FLASH_BUS_RET u_short
58 # if ( SCB9328_FLASH_INTERLEAVE == 1 )
59 # define FLASH_CMD( x ) x
60 # elif ( SCB9328_FLASH_INTERLEAVE == 2 )
61 # define FLASH_CMD( x ) (( x << 8 )| x )
63 # error "With 16bit bus only 1 or 2 chip(s) are allowed"
67 #elif ( SCB9328_FLASH_BUS_WIDTH == 4 )
68 # define FLASH_BUS vu_long
69 # define FLASH_BUS_RET u_long
70 # if ( SCB9328_FLASH_INTERLEAVE == 1 )
71 # define FLASH_CMD( x ) x
72 # elif ( SCB9328_FLASH_INTERLEAVE == 2 )
73 # define FLASH_CMD( x ) (( x << 16 )| x )
74 # elif ( SCB9328_FLASH_INTERLEAVE == 4 )
75 # define FLASH_CMD( x ) (( x << 24 )|( x << 16 ) ( x << 8 )| x )
77 # error "With 32bit bus only 1,2 or 4 chip(s) are allowed"
81 # error "Flash bus width might be 1,2,4 for 8,16,32 bit configuration"
85 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
87 static FLASH_BUS_RET flash_status_reg (void)
90 FLASH_BUS *addr = (FLASH_BUS *) 0;
92 *addr = FLASH_CMD (CFI_INTEL_CMD_READ_STATUS_REGISTER);
97 static int flash_ready (ulong timeout)
102 start = get_timer(0);
103 while ((flash_status_reg () & FLASH_CMD (CFI_INTEL_SR_READY)) !=
104 FLASH_CMD (CFI_INTEL_SR_READY)) {
105 if (get_timer(start) > timeout && timeout != 0) {
113 #if ( CONFIG_SYS_MAX_FLASH_BANKS != 1 )
114 # error "SCB9328 platform has only one flash bank!"
118 ulong flash_init (void)
121 unsigned long address = SCB9328_FLASH_BASE;
123 flash_info[0].size = SCB9328_FLASH_BANK_SIZE;
124 flash_info[0].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
125 flash_info[0].flash_id = INTEL_MANUFACT;
126 memset (flash_info[0].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
128 for (i = 0; i < CONFIG_SYS_MAX_FLASH_SECT; i++) {
129 flash_info[0].start[i] = address;
130 #ifdef SCB9328_FLASH_UNLOCK
131 /* Some devices are hw locked after start. */
132 *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_LOCK_SETUP);
133 *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_UNLOCK_BLOCK);
135 *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);
137 address += SCB9328_FLASH_SECT_SIZE;
140 flash_protect (FLAG_PROTECT_SET,
141 CONFIG_SYS_FLASH_BASE,
142 CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
145 flash_protect (FLAG_PROTECT_SET,
147 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
149 return SCB9328_FLASH_BANK_SIZE;
152 void flash_print_info (flash_info_t * info)
156 printf (" Intel vendor\n");
157 printf (" Size: %ld MB in %d Sectors\n",
158 info->size >> 20, info->sector_count);
160 printf (" Sector Start Addresses:");
161 for (i = 0; i < info->sector_count; i++) {
166 printf (" %08lX%s", info->start[i],
167 info->protect[i] ? " (RO)" : " ");
173 int flash_erase (flash_info_t * info, int s_first, int s_last)
175 int flag, non_protected = 0, sector;
180 for (sector = s_first; sector <= s_last; sector++) {
181 if (!info->protect[sector]) {
186 if (!non_protected) {
187 return ERR_PROTECTED;
191 * Disable interrupts which might cause a timeout
192 * here. Remember that our exception vectors are
193 * at address 0 in the flash, and we don't want a
194 * (ticker) exception to happen while the flash
195 * chip is in programming mode.
197 flag = disable_interrupts ();
200 /* Start erase on unprotected sectors */
201 for (sector = s_first; sector <= s_last && !ctrlc (); sector++) {
202 if (info->protect[sector]) {
203 printf ("Protected sector %2d skipping...\n", sector);
206 printf ("Erasing sector %2d ... ", sector);
209 address = (FLASH_BUS *) (info->start[sector]);
211 *address = FLASH_CMD (CFI_INTEL_CMD_BLOCK_ERASE);
212 *address = FLASH_CMD (CFI_INTEL_CMD_CONFIRM);
213 if (flash_ready (CONFIG_SYS_FLASH_ERASE_TOUT)) {
214 *address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER);
217 *address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND);
219 printf ("timeout! Aborting...\n");
222 *address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);
225 printf ("User Interrupt!\n");
227 /* allow flash to settle - wait 10 ms */
228 udelay_masked (10000);
230 enable_interrupts ();
236 static int write_data (flash_info_t * info, ulong dest, FLASH_BUS data)
238 FLASH_BUS *address = (FLASH_BUS *) dest;
242 /* Check if Flash is (sufficiently) erased */
243 if ((*address & data) != data) {
244 return ERR_NOT_ERASED;
248 * Disable interrupts which might cause a timeout
249 * here. Remember that our exception vectors are
250 * at address 0 in the flash, and we don't want a
251 * (ticker) exception to happen while the flash
252 * chip is in programming mode.
255 flag = disable_interrupts ();
257 *address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER);
258 *address = FLASH_CMD (CFI_INTEL_CMD_PROGRAM1);
261 if (!flash_ready (CONFIG_SYS_FLASH_WRITE_TOUT)) {
262 *address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND);
264 printf ("timeout! Aborting...\n");
267 *address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);
269 enable_interrupts ();
275 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
277 ulong read_addr, write_addr;
279 int i, result = ERR_OK;
282 read_addr = addr & ~(sizeof (FLASH_BUS) - 1);
283 write_addr = read_addr;
284 if (read_addr != addr) {
286 for (i = 0; i < sizeof (FLASH_BUS); i++) {
287 if (read_addr < addr || cnt == 0) {
288 data |= *((uchar *) read_addr) << i * 8;
290 data |= (*src++) << i * 8;
295 if ((result = write_data (info, write_addr, data)) != ERR_OK) {
298 write_addr += sizeof (FLASH_BUS);
300 for (; cnt >= sizeof (FLASH_BUS); cnt -= sizeof (FLASH_BUS)) {
301 if ((result = write_data (info, write_addr,
302 *((FLASH_BUS *) src))) != ERR_OK) {
305 write_addr += sizeof (FLASH_BUS);
306 src += sizeof (FLASH_BUS);
309 read_addr = write_addr;
311 for (i = 0; i < sizeof (FLASH_BUS); i++) {
313 data |= (*src++) << i * 8;
316 data |= *((uchar *) read_addr) << i * 8;
320 if ((result = write_data (info, write_addr, data)) != 0) {