--- /dev/null
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+
+flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
+
+/*
+ * Functions
+ */
+static ulong flash_get_size(vu_long *addr, flash_info_t *info);
+static int write_word(flash_info_t *info, ulong dest, ulong data);
+static void flash_get_offsets(ulong base, flash_info_t *info);
+
+unsigned long flash_init(void)
+{
+ unsigned long size_b0;
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+
+ /* Detect size */
+ size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE,
+ &flash_info[0]);
+
+ /* Setup offsets */
+ flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
+
+#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
+ /* Monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CONFIG_SYS_MONITOR_BASE,
+ CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
+ &flash_info[0]);
+#endif
+
+ flash_info[0].size = size_b0;
+
+ return size_b0;
+}
+
+/*-----------------------------------------------------------------------
+ * Fix this to support variable sector sizes
+*/
+static void flash_get_offsets(ulong base, flash_info_t *info)
+{
+ int i;
+
+ /* set up sector start address table */
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
+ /* set sector offsets for bottom boot block type */
+ for (i = 0; i < info->sector_count; i++)
+ info->start[i] = base + (i * 0x00010000);
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info(flash_info_t *info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ puts("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_BM:
+ printf("BRIGHT MICRO ");
+ break;
+ default:
+ printf("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM040:
+ printf("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
+ break;
+ 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_AM320B:
+ printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM320T:
+ printf("AM29LV320T (32 Mbit, top boot sector)\n");
+ break;
+ default:
+ printf("Unknown Chip Type\n");
+ break;
+ }
+
+ if (info->size >> 20) {
+ printf(" Size: %ld MB in %d Sectors\n",
+ info->size >> 20,
+ info->sector_count);
+ } else {
+ printf(" Size: %ld KB in %d Sectors\n",
+ info->size >> 10,
+ info->sector_count);
+ }
+
+ puts(" Sector Start Addresses:");
+
+ for (i = 0; i < info->sector_count; ++i) {
+ if ((i % 5) == 0)
+ puts("\n ");
+
+ printf(" %08lX%s",
+ info->start[i],
+ info->protect[i] ? " (RO)" : " ");
+ }
+
+ putc('\n');
+ return;
+}
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+static ulong flash_get_size(vu_long *addr, flash_info_t *info)
+{
+ short i;
+ volatile unsigned char *caddr;
+ char value;
+
+ caddr = (volatile unsigned char *)addr ;
+
+ /* Write auto select command: read Manufacturer ID */
+
+ debug("Base address is: %8p\n", caddr);
+
+ caddr[0x0555] = 0xAA;
+ caddr[0x02AA] = 0x55;
+ caddr[0x0555] = 0x90;
+
+ value = caddr[0];
+
+ debug("Manufact ID: %02x\n", value);
+
+ switch (value) {
+ case 0x01: /*AMD_MANUFACT*/
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+
+ case 0x04: /*FUJ_MANUFACT*/
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ break;
+ }
+
+ value = caddr[1]; /* device ID */
+
+ debug("Device ID: %02x\n", value);
+
+ switch (value) {
+ case AMD_ID_LV040B:
+ info->flash_id += FLASH_AM040;
+ info->sector_count = 8;
+ info->size = 0x00080000;
+ break; /* => 512Kb */
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ return 0; /* => no or unknown flash */
+ }
+
+ flash_get_offsets((ulong)addr, &flash_info[0]);
+
+ /* 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
+ */
+ caddr = (volatile unsigned char *)(info->start[i]);
+ info->protect[i] = caddr[2] & 1;
+ }
+
+ /*
+ * Prevent writes to uninitialized FLASH.
+ */
+ if (info->flash_id != FLASH_UNKNOWN) {
+ caddr = (volatile unsigned char *)info->start[0];
+ *caddr = 0xF0; /* reset bank */
+ }
+
+ return info->size;
+}
+
+
+int flash_erase(flash_info_t *info, int s_first, int s_last)
+{
+ volatile unsigned char *addr =
+ (volatile unsigned char *)(info->start[0]);
+ int flag, prot, sect, l_sect;
+ ulong start, now, last;
+
+ 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) ||
+ (info->flash_id > FLASH_AMD_COMP)) {
+ 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();
+
+ addr[0x0555] = 0xAA;
+ addr[0x02AA] = 0x55;
+ addr[0x0555] = 0x80;
+ addr[0x0555] = 0xAA;
+ addr[0x02AA] = 0x55;
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (volatile unsigned char *)(info->start[sect]);
+ addr[0] = 0x30;
+ 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 = (volatile unsigned char *)(info->start[l_sect]);
+
+ while ((addr[0] & 0xFF) != 0xFF) {
+ now = get_timer(start);
+ if (now > 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 = (volatile unsigned char *)info->start[0];
+
+ addr[0] = 0xF0; /* 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
+ */
+ l = addr - wp;
+
+ if (l != 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);
+
+ rc = write_word(info, wp, data);
+
+ if (rc != 0)
+ return rc;
+
+ wp += 4;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cnt >= 4) {
+ data = 0;
+ for (i = 0; i < 4; ++i)
+ data = (data << 8) | *src++;
+
+ rc = write_word(info, wp, data);
+
+ if (rc != 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)
+{
+ volatile unsigned char *cdest, *cdata;
+ volatile unsigned char *addr =
+ (volatile unsigned char *)(info->start[0]);
+ ulong start;
+ int flag, count = 4 ;
+
+ cdest = (volatile unsigned char *)dest ;
+ cdata = (volatile unsigned char *)&data ;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*((vu_long *)dest)&data) != data)
+ return 2;
+
+ while (count--) {
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[0x0555] = 0xAA;
+ addr[0x02AA] = 0x55;
+ addr[0x0555] = 0xA0;
+
+ *cdest = *cdata;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer(0);
+ while ((*cdest ^ *cdata) & 0x80) {
+ if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
+ return 1;
+ }
+
+ cdata++ ;
+ cdest++ ;
+ }
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff