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-rw-r--r--board/mcc200/flash.c738
1 files changed, 738 insertions, 0 deletions
diff --git a/board/mcc200/flash.c b/board/mcc200/flash.c
new file mode 100644
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--- /dev/null
+++ b/board/mcc200/flash.c
@@ -0,0 +1,738 @@
+/*
+ * (C) Copyright 2001
+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
+ *
+ * (C) Copyright 2001-2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <linux/byteorder/swab.h>
+#include <flash.h>
+
+//###CHD: gehört wieder raus ist vom PXA271 file!
+#define FLASH_28F256L18T 0x00B0 /* Intel 28F256L18T ( 32M = 128K x 255 + 32k x 4) */
+#define FLASH_28F256L18B 0x00B1 /* Intel 28F256L18B ( 32M = 32k x 4 + 128K x 255) */
+#define FLASH_28F256P30B 0x001C /* Intel 28F256P30B ( 32M = 32k x 4 + 128K x 255) */
+#define FLASH_28F256P30T 0x0019 /* Intel 28F256P30T ( 128K x 255 + 32M = 32k x 4 + */
+
+#define INTEL_ID_28F016S 0x66a066a0 /* 28F016S[VS] ID (16M = 512k x 16) */
+#define INTEL_ID_28F800B3T 0x88928892 /* 8M = 512K x 16 top boot sector */
+#define INTEL_ID_28F800B3B 0x88938893 /* 8M = 512K x 16 bottom boot sector */
+#define INTEL_ID_28F160B3T 0x88908890 /* 16M = 1M x 16 top boot sector */
+#define INTEL_ID_28F160B3B 0x88918891 /* 16M = 1M x 16 bottom boot sector */
+#define INTEL_ID_28F320B3T 0x88968896 /* 32M = 2M x 16 top boot sector */
+#define INTEL_ID_28F320B3B 0x88978897 /* 32M = 2M x 16 bottom boot sector */
+#define INTEL_ID_28F640B3T 0x88988898 /* 64M = 4M x 16 top boot sector */
+#define INTEL_ID_28F640B3B 0x88998899 /* 64M = 4M x 16 bottom boot sector */
+#define INTEL_ID_28F160F3B 0x88F488F4 /* 16M = 1M x 16 bottom boot sector */
+
+#define INTEL_ID_28F800C3T 0x88C088C0 /* 8M = 512K x 16 top boot sector */
+#define INTEL_ID_28F800C3B 0x88C188C1 /* 8M = 512K x 16 bottom boot sector */
+#define INTEL_ID_28F160C3T 0x88C288C2 /* 16M = 1M x 16 top boot sector */
+#define INTEL_ID_28F160C3B 0x88C388C3 /* 16M = 1M x 16 bottom boot sector */
+#define INTEL_ID_28F320C3T 0x88C488C4 /* 32M = 2M x 16 top boot sector */
+#define INTEL_ID_28F320C3B 0x88C588C5 /* 32M = 2M x 16 bottom boot sector */
+#define INTEL_ID_28F640C3T 0x88CC88CC /* 64M = 4M x 16 top boot sector */
+#define INTEL_ID_28F640C3B 0x88CD88CD /* 64M = 4M x 16 bottom boot sector */
+
+#define INTEL_ID_28F128J3 0x89188918 /* 16M = 8M x 16 x 128 */
+#define INTEL_ID_28F320J5 0x00140014 /* 32M = 128K x 32 */
+#define INTEL_ID_28F640J5 0x00150015 /* 64M = 128K x 64 */
+#define INTEL_ID_28F320J3A 0x00160016 /* 32M = 128K x 32 */
+#define INTEL_ID_28F640J3A 0x00170017 /* 64M = 128K x 64 */
+#define INTEL_ID_28F256L18 0x88108810 /* 32M = 128K x 255 */
+#define INTEL_ID_28F128J3A 0x00180018 /* 128M = 128K x 128 */
+#define INTEL_ID_28F256L18T 0x880D880D /* 256M = 128K x 255 + 32k x 4 */
+#define INTEL_ID_28F256L18B 0x88108810 /* 256M = 32k x 4 + 128K x 255 */
+#define INTEL_ID_28F256P30B 0x891C891C /* 256M = 32k x 4 + 128K x 255 */
+#define INTEL_ID_28F256P30T 0x89198919 /* 256M = 128K x 255 + 32k x 4 */
+#define INTEL_ID_28F64K3 0x88018801 /* 64M = 32K x 255 + 32k x 4 */
+#define INTEL_ID_28F128K3 0x88028802 /* 128M = 64K x 255 + 32k x 4 */
+#define INTEL_ID_28F256K3 0x88038803 /* 256M = 128K x 255 + 32k x 4 */
+
+#define INTEL_ID_28F160S3 0x00D000D0 /* 16M = 512K x 32 (64kB x 32) */
+#define INTEL_ID_28F320S3 0x00D400D4 /* 32M = 512K x 64 (64kB x 64) */
+
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/* Board support for 1 or 2 flash devices */
+#define FLASH_PORT_WIDTH32
+#undef FLASH_PORT_WIDTH16
+
+#ifdef FLASH_PORT_WIDTH16
+#define FLASH_PORT_WIDTH ushort
+#define FLASH_PORT_WIDTHV vu_short
+#define SWAP(x) (x)
+#else
+#define FLASH_PORT_WIDTH ulong
+#define FLASH_PORT_WIDTHV vu_long
+#define SWAP(x) (x)
+#endif
+
+/* Intel-compatible flash ID */
+#define INTEL_COMPAT 0x00890089
+#define INTEL_ALT 0x00B000B0
+
+
+
+/* Intel-compatible flash commands */
+#define INTEL_PROGRAM 0x00100010
+#define INTEL_ERASE 0x00200020
+#define INTEL_CLEAR 0x00500050
+#define INTEL_LOCKBIT 0x00600060
+#define INTEL_PROTECT 0x00010001
+#define INTEL_STATUS 0x00700070
+#define INTEL_READID 0x00900090
+#define INTEL_CONFIRM 0x00D000D0
+#define INTEL_RESET 0xFFFFFFFF
+
+/* Intel-compatible flash status bits */
+#define INTEL_FINISHED 0x00800080
+#define INTEL_OK 0x00800080
+
+#define FPW FLASH_PORT_WIDTH
+#define FPWV FLASH_PORT_WIDTHV
+
+#define mb() __asm__ __volatile__ ("" : : : "memory")
+
+///###CHD: auch wieder raus! + switch anweisung für den P30iger!
+/* Flash Organization Structure */
+typedef struct OrgDef {
+ unsigned int sector_number;
+ unsigned int sector_size;
+} OrgDef;
+
+/* Flash Organizations */
+OrgDef OrgIntel_28F256L18B[] = {
+ {4, 0x8000}, /* 4 * 32kBytes sectors */
+ {255, 0x20000}, /* 255 * 128kBytes sectors */
+};
+
+OrgDef OrgIntel_28F256L18T[] = {
+ {255, 0x20000}, /* 255 * 128kBytes sectors */
+ {4, 0x8000} /* 4 * 32kBytes sectors */
+};
+
+OrgDef OrgIntel_28F128J3A[] = {
+ {128, 0x20000}, /* 128 * 128kBytes sectors */
+};
+static unsigned int OrgSectTypeNum_28F256L18 = 2;
+static unsigned int OrgSectTypeNum_28F256J3 = 1;
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (FPW *addr, flash_info_t *info);
+static int write_data (flash_info_t *info, ulong dest, FPW data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+void inline spin_wheel (void);
+static void flash_sync_real_protect (flash_info_t * info);
+static unsigned char intel_sector_protected (flash_info_t *info, ushort sector);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+ int i;
+ ulong size = 0;
+ extern void flash_preinit(void);
+ extern void flash_afterinit(ulong, ulong);
+ ulong flashbase = CFG_FLASH_BASE;
+
+ flash_preinit();
+
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+ switch (i) {
+ case 0:
+ memset(&flash_info[i], 0, sizeof(flash_info_t));
+ flash_get_size ((FPW *) flashbase, &flash_info[i]);
+ flash_get_offsets (flash_info[i].start[0], &flash_info[i]);
+ break;
+ default:
+ panic ("configured to many flash banks!\n");
+ break;
+ }
+ size += flash_info[i].size;
+
+ /* get the h/w and s/w protection status in sync */
+ flash_sync_real_protect(&flash_info[i]);
+ }
+
+ /* Protect monitor and environment sectors
+ */
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+#ifndef CONFIG_BOOT_ROM
+ flash_protect ( FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE + monitor_flash_len - 1,
+ &flash_info[0] );
+#endif
+#endif
+
+#ifdef CFG_ENV_IS_IN_FLASH
+ flash_protect ( FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );
+#endif
+
+ flash_afterinit(flash_info[0].start[0], flash_info[0].size);
+
+ return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ return;
+ }
+
+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
+ }
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t *info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf ("missing or unknown FLASH type\n");
+ return;
+ }
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case FLASH_MAN_INTEL:
+ printf ("INTEL ");
+ break;
+ default:
+ printf ("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_28F128J3A:
+ printf ("28F128J3A\n");
+ break;
+
+ case FLASH_28F640J3A:
+ printf ("28F640J3A\n");
+ break;
+
+ case FLASH_28F320J3A:
+ printf ("28F320J3A\n");
+ break;
+
+ case FLASH_28F256P30T:
+ printf ("FLASH_28F256P30T\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) {
+ if ((i % 5) == 0)
+ printf ("\n ");
+ printf (" %08lX%s",
+ info->start[i],
+ info->protect[i] ? " (RO)" : " ");
+ }
+ printf ("\n");
+ return;
+}
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+static ulong flash_get_size (FPW *addr, flash_info_t *info)
+{
+ volatile FPW value;
+
+ /* Write auto select command: read Manufacturer ID */
+ addr[0x5555] = (FPW) 0x00AA00AA;
+ addr[0x2AAA] = (FPW) 0x00550055;
+ addr[0x5555] = (FPW) 0x00900090;
+
+ mb ();
+ udelay(100);
+
+ value = addr[0];
+
+ switch (value) {
+
+ case (FPW) INTEL_MANUFACT:
+ info->flash_id = FLASH_MAN_INTEL;
+ break;
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
+ return (0); /* no or unknown flash */
+ }
+
+ mb ();
+ value = addr[1]; /* device ID */
+
+ switch (value) {
+
+ case (FPW) INTEL_ID_28F128J3A:
+ info->flash_id += FLASH_28F128J3A;
+ info->sector_count = 128;
+ info->size = 0x02000000;
+ info->start[0] = CFG_FLASH_BASE;
+ break; /* => 32 MB */
+
+ case (FPW) INTEL_ID_28F640J3A:
+ info->flash_id += FLASH_28F640J3A;
+ info->sector_count = 64;
+ info->size = 0x01000000;
+ info->start[0] = CFG_FLASH_BASE + 0x01000000;
+ break; /* => 16 MB */
+
+ case (FPW) (INTEL_ID_28F256P30T):
+ info->flash_id += FLASH_28F256L18B;
+ info->sector_count = 128;//falsch!!!
+ info->size = 0x02000000;
+ info->start[0] = CFG_FLASH_BASE;
+ debug ("Intel StrataFlash 28F256P30T device initialized\n");
+ break; /* => 32 MB */
+
+ case (FPW) INTEL_ID_28F320J3A:
+ info->flash_id += FLASH_28F320J3A;
+ info->sector_count = 32;
+ info->size = 0x800000;
+ info->start[0] = CFG_FLASH_BASE + 0x01800000;
+ break; /* => 8 MB */
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ break;
+ }
+
+ if (info->sector_count > CFG_MAX_FLASH_SECT) {
+ printf ("** ERROR: sector count %d > max (%d) **\n",
+ info->sector_count, CFG_MAX_FLASH_SECT);
+ info->sector_count = CFG_MAX_FLASH_SECT;
+ }
+
+ addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
+
+ return (info->size);
+}
+
+
+/*
+ * This function gets the u-boot flash sector protection status
+ * (flash_info_t.protect[]) in sync with the sector protection
+ * status stored in hardware.
+ */
+static void flash_sync_real_protect (flash_info_t * info)
+{
+ int i;
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+
+ case FLASH_28F128J3A:
+ case FLASH_28F640J3A:
+ case FLASH_28F320J3A:
+ for (i = 0; i < info->sector_count; ++i) {
+ info->protect[i] = intel_sector_protected(info, i);
+ }
+ break;
+ default:
+ /* no h/w protect support */
+ break;
+ }
+}
+
+
+/*
+ * checks if "sector" in bank "info" is protected. Should work on intel
+ * strata flash chips 28FxxxJ3x in 8-bit mode.
+ * Returns 1 if sector is protected (or timed-out while trying to read
+ * protection status), 0 if it is not.
+ */
+static unsigned char intel_sector_protected (flash_info_t *info, ushort sector)
+{
+ FPWV *addr;
+ FPWV *lock_conf_addr;
+ ulong start;
+ unsigned char ret;
+
+ /*
+ * first, wait for the WSM to be finished. The rationale for
+ * waiting for the WSM to become idle for at most
+ * CFG_FLASH_ERASE_TOUT is as follows. The WSM can be busy
+ * because of: (1) erase, (2) program or (3) lock bit
+ * configuration. So we just wait for the longest timeout of
+ * the (1)-(3), i.e. the erase timeout.
+ */
+
+ /* wait at least 35ns (W12) before issuing Read Status Register */
+ udelay(1);
+ addr = (FPWV *) info->start[sector];
+ *addr = (FPW) INTEL_STATUS;
+
+ start = get_timer (0);
+ while ((*addr & (FPW) INTEL_FINISHED) != (FPW) INTEL_FINISHED) {
+ if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {
+ *addr = (FPW) INTEL_RESET; /* restore read mode */
+ printf("WSM busy too long, can't get prot status\n");
+ return 1;
+ }
+ }
+
+ /* issue the Read Identifier Codes command */
+ *addr = (FPW) INTEL_READID;
+
+ /* wait at least 35ns (W12) before reading */
+ udelay(1);
+
+ /* Intel example code uses offset of 2 for 16 bit flash */
+ lock_conf_addr = (FPWV *) info->start[sector] + 2;
+ ret = (*lock_conf_addr & (FPW) INTEL_PROTECT) ? 1 : 0;
+
+ /* put flash back in read mode */
+ *addr = (FPW) INTEL_RESET;
+
+ return ret;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ int flag, prot, sect;
+ ulong type, start, last;
+ int rcode = 0;
+
+ 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;
+ }
+
+ type = (info->flash_id & FLASH_VENDMASK);
+ if ((type != FLASH_MAN_INTEL)) {
+ printf ("Can't erase unknown flash type %08lx - aborted\n",
+ info->flash_id);
+ 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");
+ }
+
+ start = get_timer (0);
+ last = start;
+
+ /* 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 */
+ FPWV *addr = (FPWV *) (info->start[sect]);
+ FPW status;
+
+ printf ("Erasing sector %2d ... ", sect);
+
+ /* arm simple, non interrupt dependent timer */
+ start = get_timer(0);
+
+ *addr = (FPW) 0x00500050; /* clear status register */
+ *addr = (FPW) 0x00200020; /* erase setup */
+ *addr = (FPW) 0x00D000D0; /* erase confirm */
+
+ while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
+ if (get_timer(start) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ *addr = (FPW) 0x00B000B0; /* suspend erase */
+ *addr = (FPW) 0x00FF00FF; /* reset to read mode */
+ rcode = 1;
+ break;
+ }
+ }
+
+ *addr = 0x00500050; /* clear status register cmd. */
+ *addr = 0x00FF00FF; /* resest to read mode */
+
+ printf (" done\n");
+ }
+ }
+ return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong cp, wp;
+ FPW data;
+ int count, i, l, rc, port_width;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ return 4;
+ }
+/* get lower word aligned address */
+#ifdef FLASH_PORT_WIDTH16
+ wp = (addr & ~1);
+ port_width = 2;
+#else
+ wp = (addr & ~3);
+ port_width = 4;
+#endif
+
+ /*
+ * 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 < port_width && cnt > 0; ++i) {
+ data = (data << 8) | *src++;
+ --cnt;
+ ++cp;
+ }
+ for (; cnt == 0 && i < port_width; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *) cp);
+ }
+
+ if ((rc = write_data (info, wp, SWAP (data))) != 0) {
+ return (rc);
+ }
+ wp += port_width;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ count = 0;
+ while (cnt >= port_width) {
+ data = 0;
+ for (i = 0; i < port_width; ++i) {
+ data = (data << 8) | *src++;
+ }
+ if ((rc = write_data (info, wp, SWAP (data))) != 0) {
+ return (rc);
+ }
+ wp += port_width;
+ cnt -= port_width;
+ if (count++ > 0x800) {
+ spin_wheel ();
+ count = 0;
+ }
+ }
+
+ if (cnt == 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ data = 0;
+ for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
+ data = (data << 8) | *src++;
+ --cnt;
+ }
+ for (; i < port_width; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *) cp);
+ }
+
+ return (write_data (info, wp, SWAP (data)));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word or halfword to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, ulong dest, FPW data)
+{
+ FPWV *addr = (FPWV *) dest;
+ ulong status;
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*addr & data) != data) {
+ printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts ();
+
+ *addr = (FPW) 0x00400040; /* write setup */
+ *addr = data;
+
+ /* arm simple, non interrupt dependent timer */
+ start = get_timer(0);
+
+ /* wait while polling the status register */
+ while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ *addr = (FPW) 0x00FF00FF; /* restore read mode */
+ return (1);
+ }
+ }
+
+ *addr = (FPW) 0x00FF00FF; /* restore read mode */
+
+ return (0);
+}
+
+void inline spin_wheel (void)
+{
+ static int p = 0;
+ static char w[] = "\\/-";
+
+ printf ("\010%c", w[p]);
+ (++p == 3) ? (p = 0) : 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Set/Clear sector's lock bit, returns:
+ * 0 - OK
+ * 1 - Error (timeout, voltage problems, etc.)
+ */
+int flash_real_protect (flash_info_t *info, long sector, int prot)
+{
+ ulong start;
+ int i;
+ int rc = 0;
+ vu_long *addr = (vu_long *)(info->start[sector]);
+ int flag = disable_interrupts();
+
+ *addr = INTEL_CLEAR; /* Clear status register */
+ if (prot) { /* Set sector lock bit */
+ *addr = INTEL_LOCKBIT; /* Sector lock bit */
+ *addr = INTEL_PROTECT; /* set */
+ }
+ else { /* Clear sector lock bit */
+ *addr = INTEL_LOCKBIT; /* All sectors lock bits */
+ *addr = INTEL_CONFIRM; /* clear */
+ }
+
+ start = get_timer(0);
+
+ while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
+ if (get_timer(start) > CFG_FLASH_UNLOCK_TOUT) {
+ printf("Flash lock bit operation timed out\n");
+ rc = 1;
+ break;
+ }
+ }
+
+ if (*addr != INTEL_OK) {
+ printf("Flash lock bit operation failed at %08X, CSR=%08X\n",
+ (uint)addr, (uint)*addr);
+ rc = 1;
+ }
+
+ if (!rc)
+ info->protect[sector] = prot;
+
+ /*
+ * Clear lock bit command clears all sectors lock bits, so
+ * we have to restore lock bits of protected sectors.
+ * WARNING: code below re-locks sectors only for one bank (info).
+ * This causes problems on boards where several banks share
+ * the same chip, as sectors in othere banks will be unlocked
+ * but not re-locked. It works fine on pm520 though, as there
+ * is only one chip and one bank.
+ */
+ if (!prot)
+ {
+ for (i = 0; i < info->sector_count; i++)
+ {
+ if (info->protect[i])
+ {
+ start = get_timer(0);
+ addr = (vu_long *)(info->start[i]);
+ *addr = INTEL_LOCKBIT; /* Sector lock bit */
+ *addr = INTEL_PROTECT; /* set */
+ while ((*addr & INTEL_FINISHED) != INTEL_FINISHED)
+ {
+ if (get_timer(start) > CFG_FLASH_UNLOCK_TOUT)
+ {
+ printf("Flash lock bit operation timed out\n");
+ rc = 1;
+ break;
+ }
+ }
+ }
+ }
+ /*
+ * get the s/w sector protection status in sync with the h/w,
+ * in case something went wrong during the re-locking.
+ */
+ flash_sync_real_protect(info); /* resets flash to read mode */
+ }
+
+ if (flag)
+ enable_interrupts();
+
+ *addr = INTEL_RESET; /* Reset to read array mode */
+
+ return rc;
+}
generated by cgit (git 2.34.1) at 2024-12-25 09:19:59 +0000