+++ /dev/null
-/*
- * (C) Copyright 2001
- * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
- *
- * (C) Copyright 2001-2004
- * 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>
-
-
-flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
-
-/* Board support for 1 or 2 flash devices */
-#define FLASH_PORT_WIDTH8
-
-typedef unsigned char FLASH_PORT_WIDTH;
-typedef volatile unsigned char FLASH_PORT_WIDTHV;
-
-#define SWAP(x) (x)
-
-/* Intel-compatible flash ID */
-#define INTEL_COMPAT 0x89
-#define INTEL_ALT 0xB0
-
-/* Intel-compatible flash commands */
-#define INTEL_PROGRAM 0x10
-#define INTEL_ERASE 0x20
-#define INTEL_CLEAR 0x50
-#define INTEL_LOCKBIT 0x60
-#define INTEL_PROTECT 0x01
-#define INTEL_STATUS 0x70
-#define INTEL_READID 0x90
-#define INTEL_CONFIRM 0xD0
-#define INTEL_RESET 0xFF
-
-/* Intel-compatible flash status bits */
-#define INTEL_FINISHED 0x80
-#define INTEL_OK 0x80
-
-#define FPW FLASH_PORT_WIDTH
-#define FPWV FLASH_PORT_WIDTHV
-
-#define FLASH_CYCLE1 0x0555
-#define FLASH_CYCLE2 0x02aa
-
-#define WR_BLOCK 0x20
-/*-----------------------------------------------------------------------
- * 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 int write_data_block (flash_info_t * info, ulong src, ulong dest);
-static int write_word_amd (flash_info_t * info, FPWV * 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);
-static unsigned char same_chip_banks (int bank1, int bank2);
-
-/*-----------------------------------------------------------------------
- */
-
-unsigned long flash_init (void)
-{
- int i;
- ulong size = 0;
- ulong fsize = 0;
-
- for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
- memset (&flash_info[i], 0, sizeof (flash_info_t));
-
- switch (i) {
- case 0:
- flash_get_size ((FPW *) CONFIG_SYS_FLASH1_BASE,
- &flash_info[i]);
- flash_get_offsets (CONFIG_SYS_FLASH1_BASE, &flash_info[i]);
- break;
- case 1:
- flash_get_size ((FPW *) CONFIG_SYS_FLASH1_BASE,
- &flash_info[i]);
- fsize = CONFIG_SYS_FLASH1_BASE + flash_info[i - 1].size;
- flash_get_offsets (fsize, &flash_info[i]);
- break;
- case 2:
- flash_get_size ((FPW *) CONFIG_SYS_FLASH0_BASE,
- &flash_info[i]);
- flash_get_offsets (CONFIG_SYS_FLASH0_BASE, &flash_info[i]);
- break;
- case 3:
- flash_get_size ((FPW *) CONFIG_SYS_FLASH0_BASE,
- &flash_info[i]);
- fsize = CONFIG_SYS_FLASH0_BASE + flash_info[i - 1].size;
- flash_get_offsets (fsize, &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 defined (CONFIG_SYS_AMD_BOOT)
- flash_protect (FLAG_PROTECT_SET,
- CONFIG_SYS_MONITOR_BASE,
- CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
- &flash_info[2]);
- flash_protect (FLAG_PROTECT_SET,
- CONFIG_SYS_INTEL_BASE,
- CONFIG_SYS_INTEL_BASE + monitor_flash_len - 1,
- &flash_info[1]);
-#else
- flash_protect (FLAG_PROTECT_SET,
- CONFIG_SYS_MONITOR_BASE,
- CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
- &flash_info[3]);
- flash_protect (FLAG_PROTECT_SET,
- CONFIG_SYS_AMD_BASE,
- CONFIG_SYS_AMD_BASE + monitor_flash_len - 1, &flash_info[0]);
-#endif
-
- flash_protect (FLAG_PROTECT_SET,
- CONFIG_ENV1_ADDR,
- CONFIG_ENV1_ADDR + CONFIG_ENV1_SIZE - 1, &flash_info[1]);
- flash_protect (FLAG_PROTECT_SET,
- CONFIG_ENV_ADDR,
- CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[3]);
-
- 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_AMD) {
- for (i = 0; i < info->sector_count; i++) {
- info->start[i] = base + (i * PHYS_AMD_SECT_SIZE);
- info->protect[i] = 0;
- }
- }
-
- if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
- for (i = 0; i < info->sector_count; i++) {
- info->start[i] = base + (i * PHYS_INTEL_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;
- case FLASH_MAN_AMD:
- printf ("AMD ");
- break;
- default:
- printf ("Unknown Vendor ");
- break;
- }
-
- switch (info->flash_id & FLASH_TYPEMASK) {
- case FLASH_28F128J3A:
- printf ("28F128J3A\n");
- break;
-
- case FLASH_AM040:
- printf ("AMD29F040B\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)
-{
- FPWV value;
- static int amd = 0;
-
- /* Write auto select command: read Manufacturer ID */
- /* Write auto select command sequence and test FLASH answer */
- addr[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* for AMD, Intel ignores this */
- __asm__ ("sync");
- addr[FLASH_CYCLE2] = (FPW) 0x00550055; /* for AMD, Intel ignores this */
- __asm__ ("sync");
- addr[FLASH_CYCLE1] = (FPW) 0x00900090; /* selects Intel or AMD */
- __asm__ ("sync");
-
- udelay (100);
-
- switch (addr[0] & 0xff) {
-
- case (uchar) AMD_MANUFACT:
- info->flash_id = FLASH_MAN_AMD;
- value = addr[1];
- break;
-
- case (uchar) INTEL_MANUFACT:
- info->flash_id = FLASH_MAN_INTEL;
- value = addr[2];
- break;
-
- default:
- printf ("unknown\n");
- 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 */
- }
-
- switch (value) {
-
- case (FPW) INTEL_ID_28F128J3A:
- info->flash_id += FLASH_28F128J3A;
- info->sector_count = 64;
- info->size = 0x00800000; /* => 16 MB */
- break;
-
- case (FPW) AMD_ID_LV040B:
- info->flash_id += FLASH_AM040;
- if (amd == 0) {
- info->sector_count = 7;
- info->size = 0x00070000; /* => 448 KB */
- amd = 1;
- } else {
- /* for Environment settings */
- info->sector_count = 1;
- info->size = PHYS_AMD_SECT_SIZE; /* => 64 KB */
- amd = 0;
- }
- break;
-
- default:
- info->flash_id = FLASH_UNKNOWN;
- break;
- }
-
- if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
- printf ("** ERROR: sector count %d > max (%d) **\n",
- info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
- info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
- }
-
- if (value == (FPW) INTEL_ID_28F128J3A)
- addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
- else
- addr[0] = (FPW) 0x00F000F0; /* 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:
- for (i = 0; i < info->sector_count; ++i) {
- info->protect[i] = intel_sector_protected(info, i);
- }
- break;
- case FLASH_AM040:
- 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
- * CONFIG_SYS_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) > CONFIG_SYS_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 4 for 8-bit flash */
- lock_conf_addr = (FPWV *) info->start[sector] + 4;
- ret = (*lock_conf_addr & (FPW) INTEL_PROTECT) ? 1 : 0;
-
- /* put flash back in read mode */
- *addr = (FPW) INTEL_RESET;
-
- return ret;
-}
-
-
-/*
- * Checks if "bank1" and "bank2" are on the same chip. Returns 1 if they
- * are and 0 otherwise.
- */
-static unsigned char same_chip_banks (int bank1, int bank2)
-{
- unsigned char same_chip[CONFIG_SYS_MAX_FLASH_BANKS][CONFIG_SYS_MAX_FLASH_BANKS] = {
- {1, 1, 0, 0},
- {1, 1, 0, 0},
- {0, 0, 1, 1},
- {0, 0, 1, 1}
- };
- return same_chip[bank1][bank2];
-}
-
-
-/*-----------------------------------------------------------------------
- */
-int flash_erase (flash_info_t * info, int s_first, int s_last)
-{
- int flag, prot, sect;
- ulong type, start;
- int rcode = 0, intel = 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)) {
- type = (info->flash_id & FLASH_VENDMASK);
- if ((type != FLASH_MAN_AMD)) {
- printf ("Can't erase unknown flash type %08lx - aborted\n",
- info->flash_id);
- return 1;
- }
- }
-
- if (type == FLASH_MAN_INTEL)
- intel = 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);
-
- /* 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);
-
- if (intel) {
- *addr = (FPW) 0x00500050; /* clear status register */
- *addr = (FPW) 0x00200020; /* erase setup */
- *addr = (FPW) 0x00D000D0; /* erase confirm */
- } else {
- FPWV *base; /* first address in bank */
-
- base = (FPWV *) (CONFIG_SYS_AMD_BASE);
- base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
- base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
- base[FLASH_CYCLE1] = (FPW) 0x00800080; /* erase mode */
- base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
- base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
- *addr = (FPW) 0x00300030; /* erase sector */
- }
-
- while (((status =
- *addr) & (FPW) 0x00800080) !=
- (FPW) 0x00800080) {
- if (get_timer (start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
- printf ("Timeout\n");
- if (intel) {
- *addr = (FPW) 0x00B000B0; /* suspend erase */
- *addr = (FPW) 0x00FF00FF; /* reset to read mode */
- } else
- *addr = (FPW) 0x00F000F0; /* reset to read mode */
-
- rcode = 1;
- break;
- }
- }
-
- if (intel) {
- *addr = (FPW) 0x00500050; /* clear status register cmd. */
- *addr = (FPW) 0x00FF00FF; /* resest to read mode */
- } else
- *addr = (FPW) 0x00F000F0; /* reset to read mode */
-
- printf (" done\n");
- }
- }
- if (flag)
- enable_interrupts();
-
- 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)
-{
- if (info->flash_id == FLASH_UNKNOWN) {
- return 4;
- }
-
- switch (info->flash_id & FLASH_VENDMASK) {
- case FLASH_MAN_AMD:
- {
- FPW data = 0; /* 16 or 32 bit word, matches flash bus width */
- int bytes; /* number of bytes to program in current word */
- int left; /* number of bytes left to program */
- int i, res;
-
- for (left = cnt, res = 0;
- left > 0 && res == 0;
- addr += sizeof (data), left -=
- sizeof (data) - bytes) {
-
- bytes = addr & (sizeof (data) - 1);
- addr &= ~(sizeof (data) - 1);
-
- /* combine source and destination data so can program
- * an entire word of 16 or 32 bits
- */
- for (i = 0; i < sizeof (data); i++) {
- data <<= 8;
- if (i < bytes || i - bytes >= left)
- data += *((uchar *) addr + i);
- else
- data += *src++;
- }
-
- res = write_word_amd (info, (FPWV *) addr,
- data);
- }
- return res;
- } /* case FLASH_MAN_AMD */
-
- case FLASH_MAN_INTEL:
- {
- ulong cp, wp;
- FPW data;
- int count, i, l, rc, port_width;
-
- /* get lower word aligned address */
- wp = addr;
- port_width = 1;
-
- /*
- * 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;
- }
-
- if (cnt > WR_BLOCK) {
- /*
- * handle word aligned part
- */
- count = 0;
- while (cnt >= WR_BLOCK) {
-
- if ((rc =
- write_data_block (info,
- (ulong) src,
- wp)) != 0)
- return (rc);
-
- wp += WR_BLOCK;
- src += WR_BLOCK;
- cnt -= WR_BLOCK;
-
- if (count++ > 0x800) {
- spin_wheel ();
- count = 0;
- }
- }
- }
-
- if (cnt < WR_BLOCK) {
- /*
- * 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)));
- } /* case FLASH_MAN_INTEL */
-
- } /* switch */
- return (0);
-}
-
-/*-----------------------------------------------------------------------
- * 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 start;
- int flag, rc = 0;
-
- /* Check if Flash is (sufficiently) erased */
- if ((*addr & data) != data) {
- printf ("not erased at %08lx (%lx)\n", (ulong)addr, (ulong)*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 ((*addr & (FPW) 0x00800080) != (FPW) 0x00800080) {
- if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
- rc = 1;
- goto OUT;
- }
- }
-
-OUT:
- *addr = (FPW)0x00FF00FF; /* restore read mode */
-
- if (flag)
- enable_interrupts();
-
- return rc;
-}
-
-/*-----------------------------------------------------------------------
- * Write a word or halfword to Flash, returns:
- * 0 - OK
- * 1 - write timeout
- * 2 - Flash not erased
- */
-static int write_data_block (flash_info_t * info, ulong src, ulong dest)
-{
- FPWV *srcaddr = (FPWV *) src;
- FPWV *dstaddr = (FPWV *) dest;
- ulong start;
- int flag, i, rc = 0;
-
- /* Check if Flash is (sufficiently) erased */
- for (i = 0; i < WR_BLOCK; i++)
- if ((*dstaddr++ & 0xff) != 0xff) {
- printf ("not erased at %08lx (%lx)\n",
- (ulong)dstaddr, (ulong)*dstaddr);
- return (2);
- }
-
- dstaddr = (FPWV *) dest;
-
- /* Disable interrupts which might cause a timeout here */
- flag = disable_interrupts ();
-
- *dstaddr = (FPW) 0x00e800e8; /* write block setup */
-
- /* arm simple, non interrupt dependent timer */
- start = get_timer (0);
-
- /* wait while polling the status register */
- while ((*dstaddr & (FPW)0x00800080) != (FPW)0x00800080) {
- if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
- rc = 1;
- goto OUT;
- }
- }
-
- *dstaddr = (FPW) 0x001f001f; /* write 32 to buffer */
- for (i = 0; i < WR_BLOCK; i++)
- *dstaddr++ = *srcaddr++;
-
- dstaddr -= 1;
- *dstaddr = (FPW) 0x00d000d0; /* write 32 to buffer */
-
- /* arm simple, non interrupt dependent timer */
- start = get_timer (0);
-
- /* wait while polling the status register */
- while ((*dstaddr & (FPW) 0x00800080) != (FPW) 0x00800080) {
- if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
- *dstaddr = (FPW) 0x00FF00FF; /* restore read mode */
- return (1);
- }
- }
-
-OUT:
- *dstaddr = (FPW)0x00FF00FF; /* restore read mode */
- if (flag)
- enable_interrupts();
-
- return rc;
-}
-
-/*-----------------------------------------------------------------------
- * Write a word to Flash for AMD FLASH
- * A word is 16 or 32 bits, whichever the bus width of the flash bank
- * (not an individual chip) is.
- *
- * returns:
- * 0 - OK
- * 1 - write timeout
- * 2 - Flash not erased
- */
-static int write_word_amd (flash_info_t * info, FPWV * dest, FPW data)
-{
- ulong start;
- int flag;
- int res = 0; /* result, assume success */
- FPWV *base; /* first address in flash bank */
-
- /* Check if Flash is (sufficiently) erased */
- if ((*dest & data) != data) {
- return (2);
- }
-
- base = (FPWV *) (CONFIG_SYS_AMD_BASE);
-
- /* Disable interrupts which might cause a timeout here */
- flag = disable_interrupts ();
-
- base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */
- base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */
- base[FLASH_CYCLE1] = (FPW) 0x00A000A0; /* selects program mode */
-
- *dest = data; /* start programming the data */
-
- /* re-enable interrupts if necessary */
- if (flag)
- enable_interrupts ();
-
- start = get_timer (0);
-
- /* data polling for D7 */
- while (res == 0
- && (*dest & (FPW) 0x00800080) != (data & (FPW) 0x00800080)) {
- if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
- *dest = (FPW) 0x00F000F0; /* reset bank */
- res = 1;
- }
- }
-
- return (res);
-}
-
-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, j;
- int curr_bank;
- int bank;
- int rc = 0;
- FPWV *addr = (FPWV *) (info->start[sector]);
- int flag = disable_interrupts ();
-
- /*
- * 29F040B AMD flash does not support software protection/unprotection,
- * the only way to protect the AMD flash is marked it as prot bit.
- * This flash only support hardware protection, by supply or not supply
- * 12vpp to the flash
- */
- if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
- info->protect[sector] = prot;
-
- return 0;
- }
-
- *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) > CONFIG_SYS_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.
- */
- if (!prot) {
- /*
- * re-locking must be done for all banks that belong on one
- * FLASH chip, as all the sectors on the chip were unlocked
- * by INTEL_LOCKBIT/INTEL_CONFIRM commands. (let's hope
- * that banks never span chips, in particular chips which
- * support h/w protection differently).
- */
-
- /* find the current bank number */
- curr_bank = CONFIG_SYS_MAX_FLASH_BANKS + 1;
- for (j = 0; j < CONFIG_SYS_MAX_FLASH_BANKS; ++j) {
- if (&flash_info[j] == info) {
- curr_bank = j;
- }
- }
- if (curr_bank == CONFIG_SYS_MAX_FLASH_BANKS + 1) {
- printf("Error: can't determine bank number!\n");
- }
-
- for (bank = 0; bank < CONFIG_SYS_MAX_FLASH_BANKS; ++bank) {
- if (!same_chip_banks(curr_bank, bank)) {
- continue;
- }
- info = &flash_info[bank];
- for (i = 0; i < info->sector_count; i++) {
- if (info->protect[i]) {
- start = get_timer (0);
- addr = (FPWV *) (info->start[i]);
- *addr = INTEL_LOCKBIT; /* Sector lock bit */
- *addr = INTEL_PROTECT; /* set */
- while ((*addr & INTEL_FINISHED) !=
- INTEL_FINISHED) {
- if (get_timer (start) >
- CONFIG_SYS_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;
-}
projects / karo-tx-uboot.git / blobdiff