--- /dev/null
+/*
+ * (C) Copyright 2001
+ * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#ifdef __PPC__
+#include <asm/ppc4xx.h>
+#endif
+#include <asm/processor.h>
+
+flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+ int i;
+ short n;
+
+ /* set up sector start address table */
+ if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
+ for (i = 0; i < info->sector_count; i++)
+ info->start[i] = base + (i * 0x00010000);
+ } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
+ /* set sector offsets for bottom boot block type */
+ for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */
+ info->start[i] = base;
+ base += 8 << 10;
+ }
+ while (i < info->sector_count) { /* 64k regular sectors */
+ info->start[i] = base;
+ base += 64 << 10;
+ ++i;
+ }
+ } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
+ /* set sector offsets for top boot block type */
+ base += info->size;
+ i = info->sector_count;
+ for (n=0; n<8; ++n) { /* 8 x 8k boot sectors */
+ base -= 8 << 10;
+ --i;
+ info->start[i] = base;
+ }
+ while (i > 0) { /* 64k regular sectors */
+ base -= 64 << 10;
+ --i;
+ info->start[i] = base;
+ }
+ } else {
+ if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block type */
+ info->start[0] = base + 0x00000000;
+ info->start[1] = base + 0x00004000;
+ info->start[2] = base + 0x00006000;
+ info->start[3] = base + 0x00008000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00010000) - 0x00030000;
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - 0x00004000;
+ info->start[i--] = base + info->size - 0x00006000;
+ info->start[i--] = base + info->size - 0x00008000;
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * 0x00010000;
+ }
+ }
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t *info)
+{
+ int i;
+ int k;
+ int size;
+ int erased;
+ volatile unsigned long *flash;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf ("missing or unknown FLASH type\n");
+ return;
+ }
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case FLASH_MAN_AMD: printf ("AMD "); break;
+ case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
+ case FLASH_MAN_SST: printf ("SST "); break;
+ case FLASH_MAN_EXCEL: printf ("Excel Semiconductor "); break;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM320T: printf ("AM29LV320T (32 M, top sector)\n");
+ break;
+ case FLASH_AM320B: printf ("AM29LV320B (32 M, bottom sector)\n");
+ break;
+ case FLASH_AMDL322T: printf ("AM29DL322T (32 M, top sector)\n");
+ break;
+ case FLASH_AMDL322B: printf ("AM29DL322B (32 M, bottom sector)\n");
+ break;
+ case FLASH_AMDL323T: printf ("AM29DL323T (32 M, top sector)\n");
+ break;
+ case FLASH_AMDL323B: printf ("AM29DL323B (32 M, bottom sector)\n");
+ break;
+ case FLASH_AM640U: printf ("AM29LV640D (64 M, uniform sector)\n");
+ break;
+ case FLASH_SST800A: printf ("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
+ break;
+ case FLASH_SST160A: printf ("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
+ break;
+ case FLASH_SST320: printf ("SST39LF/VF320 (32 Mbit, uniform sector size)\n");
+ break;
+ case FLASH_SST640: printf ("SST39LF/VF640 (64 Mbit, uniform sector size)\n");
+ break;
+ default: printf ("Unknown Chip Type\n");
+ break;
+ }
+
+ printf (" Size: %ld MB in %d Sectors\n",
+ info->size >> 20, info->sector_count);
+
+ printf (" Sector Start Addresses:");
+ for (i=0; i<info->sector_count; ++i) {
+#ifdef CONFIG_SYS_FLASH_EMPTY_INFO
+ /*
+ * Check if whole sector is erased
+ */
+ if (i != (info->sector_count-1))
+ size = info->start[i+1] - info->start[i];
+ else
+ size = info->start[0] + info->size - info->start[i];
+ erased = 1;
+ flash = (volatile unsigned long *)info->start[i];
+ size = size >> 2; /* divide by 4 for longword access */
+ for (k=0; k<size; k++)
+ {
+ if (*flash++ != 0xffffffff)
+ {
+ erased = 0;
+ break;
+ }
+ }
+
+ if ((i % 5) == 0)
+ printf ("\n ");
+ /* print empty and read-only info */
+ printf (" %08lX%s%s",
+ info->start[i],
+ erased ? " E" : " ",
+ info->protect[i] ? "RO " : " ");
+#else
+ if ((i % 5) == 0)
+ printf ("\n ");
+ printf (" %08lX%s",
+ info->start[i],
+ info->protect[i] ? " (RO)" : " ");
+#endif
+
+ }
+ printf ("\n");
+ return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+static ulong flash_get_size (vu_long *addr, flash_info_t *info)
+{
+ short i;
+ short n;
+ CONFIG_SYS_FLASH_WORD_SIZE value;
+ ulong base = (ulong)addr;
+ volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)addr;
+
+ /* Write auto select command: read Manufacturer ID */
+ addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
+ addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
+ addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00900090;
+
+ value = addr2[CONFIG_SYS_FLASH_READ0];
+
+ switch (value) {
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case (CONFIG_SYS_FLASH_WORD_SIZE)FUJ_MANUFACT:
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ case (CONFIG_SYS_FLASH_WORD_SIZE)SST_MANUFACT:
+ info->flash_id = FLASH_MAN_SST;
+ break;
+ case (CONFIG_SYS_FLASH_WORD_SIZE)EXCEL_MANUFACT:
+ info->flash_id = FLASH_MAN_EXCEL;
+ break;
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0); /* no or unknown flash */
+ }
+
+ value = addr2[CONFIG_SYS_FLASH_READ1]; /* device ID */
+
+ switch (value) {
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400T:
+ info->flash_id += FLASH_AM400T;
+ info->sector_count = 11;
+ info->size = 0x00080000;
+ break; /* => 0.5 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV400B:
+ info->flash_id += FLASH_AM400B;
+ info->sector_count = 11;
+ info->size = 0x00080000;
+ break; /* => 0.5 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800T:
+ info->flash_id += FLASH_AM800T;
+ info->sector_count = 19;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV800B:
+ info->flash_id += FLASH_AM800B;
+ info->sector_count = 19;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160T:
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV160B:
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 35;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320T:
+ info->flash_id += FLASH_AM320T;
+ info->sector_count = 71;
+ info->size = 0x00400000; break; /* => 4 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV320B:
+ info->flash_id += FLASH_AM320B;
+ info->sector_count = 71;
+ info->size = 0x00400000; break; /* => 4 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322T:
+ info->flash_id += FLASH_AMDL322T;
+ info->sector_count = 71;
+ info->size = 0x00400000; break; /* => 4 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL322B:
+ info->flash_id += FLASH_AMDL322B;
+ info->sector_count = 71;
+ info->size = 0x00400000; break; /* => 4 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323T:
+ info->flash_id += FLASH_AMDL323T;
+ info->sector_count = 71;
+ info->size = 0x00400000; break; /* => 4 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_DL323B:
+ info->flash_id += FLASH_AMDL323B;
+ info->sector_count = 71;
+ info->size = 0x00400000; break; /* => 4 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)AMD_ID_LV640U:
+ info->flash_id += FLASH_AM640U;
+ info->sector_count = 128;
+ info->size = 0x00800000; break; /* => 8 MB */
+
+#if !(defined(CONFIG_ADCIOP) || defined(CONFIG_DASA_SIM))
+ case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF800A:
+ info->flash_id += FLASH_SST800A;
+ info->sector_count = 16;
+ info->size = 0x00100000;
+ break; /* => 1 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF160A:
+ case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF1601:
+ case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF1602:
+ info->flash_id += FLASH_SST160A;
+ info->sector_count = 32;
+ info->size = 0x00200000;
+ break; /* => 2 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF3201:
+ case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF3202:
+ info->flash_id += FLASH_SST320;
+ info->sector_count = 64;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+
+ case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF6401:
+ case (CONFIG_SYS_FLASH_WORD_SIZE)SST_ID_xF6402:
+ info->flash_id += FLASH_SST640;
+ info->sector_count = 128;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+#endif
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ return (0); /* => no or unknown flash */
+
+ }
+
+ /* set up sector start address table */
+ if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
+ for (i = 0; i < info->sector_count; i++)
+ info->start[i] = base + (i * 0x00010000);
+ } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322B) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323B) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324B)) {
+ /* set sector offsets for bottom boot block type */
+ for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */
+ info->start[i] = base;
+ base += 8 << 10;
+ }
+ while (i < info->sector_count) { /* 64k regular sectors */
+ info->start[i] = base;
+ base += 64 << 10;
+ ++i;
+ }
+ } else if (((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL322T) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL323T) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T) ||
+ ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMDL324T)) {
+ /* set sector offsets for top boot block type */
+ base += info->size;
+ i = info->sector_count;
+ for (n=0; n<8; ++n) { /* 8 x 8k boot sectors */
+ base -= 8 << 10;
+ --i;
+ info->start[i] = base;
+ }
+ while (i > 0) { /* 64k regular sectors */
+ base -= 64 << 10;
+ --i;
+ info->start[i] = base;
+ }
+ } else {
+ if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block type */
+ info->start[0] = base + 0x00000000;
+ info->start[1] = base + 0x00004000;
+ info->start[2] = base + 0x00006000;
+ info->start[3] = base + 0x00008000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00010000) - 0x00030000;
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - 0x00004000;
+ info->start[i--] = base + info->size - 0x00006000;
+ info->start[i--] = base + info->size - 0x00008000;
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * 0x00010000;
+ }
+ }
+ }
+
+ /* check for protected sectors */
+ for (i = 0; i < info->sector_count; i++) {
+ /* read sector protection at sector address, (A7 .. A0) = 0x02 */
+ /* D0 = 1 if protected */
+ addr2 = (volatile CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[i]);
+ if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD)
+ info->protect[i] = 0;
+ else
+ info->protect[i] = addr2[CONFIG_SYS_FLASH_READ2] & 1;
+ }
+
+ /*
+ * Prevent writes to uninitialized FLASH.
+ */
+ if (info->flash_id != FLASH_UNKNOWN) {
+ addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
+ *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
+ }
+
+ return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ volatile CONFIG_SYS_FLASH_WORD_SIZE *addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
+ volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2;
+ int flag, prot, sect, l_sect;
+ ulong start, now, last;
+ int i;
+
+ if ((s_first < 0) || (s_first > s_last)) {
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf ("- missing\n");
+ } else {
+ printf ("- no sectors to erase\n");
+ }
+ return 1;
+ }
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf ("Can't erase unknown flash type - aborted\n");
+ return 1;
+ }
+
+ prot = 0;
+ for (sect=s_first; sect<=s_last; ++sect) {
+ if (info->protect[sect]) {
+ prot++;
+ }
+ }
+
+ if (prot) {
+ printf ("- Warning: %d protected sectors will not be erased!\n",
+ prot);
+ } else {
+ printf ("\n");
+ }
+
+ l_sect = -1;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[sect]);
+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
+ addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
+ addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
+ addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
+ addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
+ addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
+ addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00500050; /* block erase */
+ for (i=0; i<50; i++)
+ udelay(1000); /* wait 1 ms */
+ } else {
+ if (sect == s_first) {
+ addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
+ addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
+ addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080;
+ addr[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
+ addr[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
+ }
+ addr2[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00300030; /* sector erase */
+ }
+ l_sect = sect;
+ }
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ /*
+ * We wait for the last triggered sector
+ */
+ if (l_sect < 0)
+ goto DONE;
+
+ start = get_timer (0);
+ last = start;
+ addr = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[l_sect]);
+ while ((addr[0] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) != (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) {
+ if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ return 1;
+ }
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+
+DONE:
+ /* reset to read mode */
+ addr = (CONFIG_SYS_FLASH_WORD_SIZE *)info->start[0];
+ addr[0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
+
+ printf (" done\n");
+ return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong cp, wp, data;
+ int i, l, rc;
+
+ wp = (addr & ~3); /* get lower word aligned address */
+
+ /*
+ * handle unaligned start bytes
+ */
+ if ((l = addr - wp) != 0) {
+ data = 0;
+ for (i=0, cp=wp; i<l; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+ for (; i<4 && cnt>0; ++i) {
+ data = (data << 8) | *src++;
+ --cnt;
+ ++cp;
+ }
+ for (; cnt==0 && i<4; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cnt >= 4) {
+ data = 0;
+ for (i=0; i<4; ++i) {
+ data = (data << 8) | *src++;
+ }
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ cnt -= 4;
+ }
+
+ if (cnt == 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ data = 0;
+ for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
+ data = (data << 8) | *src++;
+ --cnt;
+ }
+ for (; i<4; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ return (write_word(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word (flash_info_t *info, ulong dest, ulong data)
+{
+ ulong *data_ptr = &data;
+ volatile CONFIG_SYS_FLASH_WORD_SIZE *addr2 = (CONFIG_SYS_FLASH_WORD_SIZE *)(info->start[0]);
+ volatile CONFIG_SYS_FLASH_WORD_SIZE *dest2 = (CONFIG_SYS_FLASH_WORD_SIZE *)dest;
+ volatile CONFIG_SYS_FLASH_WORD_SIZE *data2 = (CONFIG_SYS_FLASH_WORD_SIZE *)data_ptr;
+ ulong start;
+ int flag;
+ int i;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*((vu_long *)dest) & data) != data) {
+ return (2);
+ }
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ for (i=0; i<4/sizeof(CONFIG_SYS_FLASH_WORD_SIZE); i++)
+ {
+ addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00AA00AA;
+ addr2[CONFIG_SYS_FLASH_ADDR1] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00550055;
+ addr2[CONFIG_SYS_FLASH_ADDR0] = (CONFIG_SYS_FLASH_WORD_SIZE)0x00A000A0;
+
+ dest2[i] = data2[i];
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while ((dest2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080) !=
+ (data2[i] & (CONFIG_SYS_FLASH_WORD_SIZE)0x00800080)) {
+ if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ }
+
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
Code Review / kvmfornfv.git / blobdiff