3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * SPDX-License-Identifier: GPL-2.0+
12 #include <linux/byteorder/swab.h>
15 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
17 /* Board support for 1 or 2 flash devices */
18 #define FLASH_PORT_WIDTH32
19 #undef FLASH_PORT_WIDTH16
21 #ifdef FLASH_PORT_WIDTH16
22 #define FLASH_PORT_WIDTH ushort
23 #define FLASH_PORT_WIDTHV vu_short
24 #define SWAP(x) __swab16(x)
26 #define FLASH_PORT_WIDTH ulong
27 #define FLASH_PORT_WIDTHV vu_long
28 #define SWAP(x) __swab32(x)
31 #define FPW FLASH_PORT_WIDTH
32 #define FPWV FLASH_PORT_WIDTHV
34 #define mb() __asm__ __volatile__ ("" : : : "memory")
36 /*-----------------------------------------------------------------------
39 static ulong flash_get_size (FPW *addr, flash_info_t *info);
40 static int write_data (flash_info_t *info, ulong dest, FPW data);
41 static void flash_get_offsets (ulong base, flash_info_t *info);
42 void inline spin_wheel (void);
44 /*-----------------------------------------------------------------------
47 unsigned long flash_init (void)
52 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
55 flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
56 flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
59 flash_get_size ((FPW *) PHYS_FLASH_2, &flash_info[i]);
60 flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
63 panic ("configured too many flash banks!\n");
66 size += flash_info[i].size;
69 /* Protect monitor and environment sectors
71 flash_protect ( FLAG_PROTECT_SET,
72 CONFIG_SYS_FLASH_BASE,
73 CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
76 flash_protect ( FLAG_PROTECT_SET,
78 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0] );
83 /*-----------------------------------------------------------------------
85 static void flash_get_offsets (ulong base, flash_info_t *info)
89 if (info->flash_id == FLASH_UNKNOWN) {
93 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
94 for (i = 0; i < info->sector_count; i++) {
95 info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
101 /*-----------------------------------------------------------------------
103 void flash_print_info (flash_info_t *info)
107 if (info->flash_id == FLASH_UNKNOWN) {
108 printf ("missing or unknown FLASH type\n");
112 switch (info->flash_id & FLASH_VENDMASK) {
113 case FLASH_MAN_INTEL:
117 printf ("Unknown Vendor ");
121 switch (info->flash_id & FLASH_TYPEMASK) {
122 case FLASH_28F128J3A:
123 printf ("28F128J3A\n");
126 printf ("Unknown Chip Type\n");
130 printf (" Size: %ld MB in %d Sectors\n",
131 info->size >> 20, info->sector_count);
133 printf (" Sector Start Addresses:");
134 for (i = 0; i < info->sector_count; ++i) {
139 info->protect[i] ? " (RO)" : " ");
146 * The following code cannot be run from FLASH!
148 static ulong flash_get_size (FPW *addr, flash_info_t *info)
152 /* Write auto select command: read Manufacturer ID */
153 addr[0x5555] = (FPW) 0x00AA00AA;
154 addr[0x2AAA] = (FPW) 0x00550055;
155 addr[0x5555] = (FPW) 0x00900090;
162 case (FPW) INTEL_MANUFACT:
163 info->flash_id = FLASH_MAN_INTEL;
167 info->flash_id = FLASH_UNKNOWN;
168 info->sector_count = 0;
170 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
171 return (0); /* no or unknown flash */
175 value = addr[1]; /* device ID */
179 case (FPW) INTEL_ID_28F128J3A:
180 info->flash_id += FLASH_28F128J3A;
181 info->sector_count = 128;
182 info->size = 0x02000000;
183 break; /* => 16 MB */
186 info->flash_id = FLASH_UNKNOWN;
190 if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
191 printf ("** ERROR: sector count %d > max (%d) **\n",
192 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
193 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
196 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
202 /*-----------------------------------------------------------------------
205 int flash_erase (flash_info_t *info, int s_first, int s_last)
211 if ((s_first < 0) || (s_first > s_last)) {
212 if (info->flash_id == FLASH_UNKNOWN) {
213 printf ("- missing\n");
215 printf ("- no sectors to erase\n");
220 type = (info->flash_id & FLASH_VENDMASK);
221 if ((type != FLASH_MAN_INTEL)) {
222 printf ("Can't erase unknown flash type %08lx - aborted\n",
228 for (sect = s_first; sect <= s_last; ++sect) {
229 if (info->protect[sect]) {
235 printf ("- Warning: %d protected sectors will not be erased!\n",
241 /* Disable interrupts which might cause a timeout here */
242 disable_interrupts();
244 /* Start erase on unprotected sectors */
245 for (sect = s_first; sect <= s_last; sect++) {
246 if (info->protect[sect] == 0) { /* not protected */
247 FPWV *addr = (FPWV *) (info->start[sect]);
250 printf ("Erasing sector %2d ... ", sect);
252 /* arm simple, non interrupt dependent timer */
253 start = get_timer(0);
255 *addr = (FPW) 0x00500050; /* clear status register */
256 *addr = (FPW) 0x00200020; /* erase setup */
257 *addr = (FPW) 0x00D000D0; /* erase confirm */
259 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
260 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
261 printf ("Timeout\n");
262 *addr = (FPW) 0x00B000B0; /* suspend erase */
263 *addr = (FPW) 0x00FF00FF; /* reset to read mode */
269 *addr = 0x00500050; /* clear status register cmd. */
270 *addr = 0x00FF00FF; /* resest to read mode */
278 /*-----------------------------------------------------------------------
279 * Copy memory to flash, returns:
282 * 2 - Flash not erased
283 * 4 - Flash not identified
286 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
290 int count, i, l, rc, port_width;
292 if (info->flash_id == FLASH_UNKNOWN) {
295 /* get lower word aligned address */
296 #ifdef FLASH_PORT_WIDTH16
305 * handle unaligned start bytes
307 if ((l = addr - wp) != 0) {
309 for (i = 0, cp = wp; i < l; ++i, ++cp) {
310 data = (data << 8) | (*(uchar *) cp);
312 for (; i < port_width && cnt > 0; ++i) {
313 data = (data << 8) | *src++;
317 for (; cnt == 0 && i < port_width; ++i, ++cp) {
318 data = (data << 8) | (*(uchar *) cp);
321 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
328 * handle word aligned part
331 while (cnt >= port_width) {
333 for (i = 0; i < port_width; ++i) {
334 data = (data << 8) | *src++;
336 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
341 if (count++ > 0x800) {
352 * handle unaligned tail bytes
355 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
356 data = (data << 8) | *src++;
359 for (; i < port_width; ++i, ++cp) {
360 data = (data << 8) | (*(uchar *) cp);
363 return (write_data (info, wp, SWAP (data)));
366 /*-----------------------------------------------------------------------
367 * Write a word or halfword to Flash, returns:
370 * 2 - Flash not erased
372 static int write_data (flash_info_t *info, ulong dest, FPW data)
374 FPWV *addr = (FPWV *) dest;
378 /* Check if Flash is (sufficiently) erased */
379 if ((*addr & data) != data) {
380 printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
383 /* Disable interrupts which might cause a timeout here */
384 disable_interrupts();
386 *addr = (FPW) 0x00400040; /* write setup */
389 /* arm simple, non interrupt dependent timer */
390 start = get_timer(0);
392 /* wait while polling the status register */
393 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
394 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
395 *addr = (FPW) 0x00FF00FF; /* restore read mode */
400 *addr = (FPW) 0x00FF00FF; /* restore read mode */
405 void inline spin_wheel (void)
408 static char w[] = "\\/-";
410 printf ("\010%c", w[p]);
411 (++p == 3) ? (p = 0) : 0;